Cranberry juice - General Topics

What would happen to my phone if I completely submerged it in cranberry juice? I'm trying to pass a Chem class and the professor wants me to do something impressive with my phone since he sees me on it all the time. I showed him Cyanogenmod and the like but he's not fazed. He's like, 75 and doesn't understand computers. I don't know about the electrical capacitance of berry juice so I was wondering if I put my myTouch 4G Slide in a clear bucket of cranberry juice whether or not it would still be on while in the juice.

AndrMatr said:
What would happen to my phone if I completely submerged it in cranberry juice? I'm trying to pass a Chem class and the professor wants me to do something impressive with my phone since he sees me on it all the time. I showed him Cyanogenmod and the like but he's not fazed. He's like, 75 and doesn't understand computers. I don't know about the electrical capacitance of berry juice so I was wondering if I put my myTouch 4G Slide in a clear bucket of cranberry juice whether or not it would still be on while in the juice.
Click to expand...
Click to collapse
You would fry your phone. Nothing you do will be able to impress him as his point is that you shouldn’t be on it in class. Mainly with that device. There is not alot you can do. Maybe remotely login to your home pc. Thats about it. Also Showing him CM is not really impressive. They are turning into the running joke of the android world.

zelendel said:
You would fry your phone. Nothing you do will be able to impress him as his point is that you shouldn’t be on it in class. Mainly with that device. There is not alot you can do. Maybe remotely login to your home pc. Thats about it. Also Showing him CM is not really impressive. They are turning into the running joke of the android world.
Click to expand...
Click to collapse
Well, isn't that a little discouraging?
Maybe I could submerge it in colored mineral oil since it doesn't conduct electricity? I saw some PCs submerged in mineral oil on Youtube.
And how is CM the "running joke of the Android world"? What are you using, MIUI? Or homebrew?
And he honestly doesn't care that I'm on it. He says, "It's your grade. Do what you want." and I have an A+ anyway. He just wants me to do something cool.

AndrMatr said:
Well, isn't that a little discouraging?
Maybe I could submerge it in colored mineral oil since it doesn't conduct electricity? I saw some PCs submerged in mineral oil on Youtube.
And how is CM the "running joke of the Android world"? What are you using, MIUI? Or homebrew?
And he honestly doesn't care that I'm on it. He says, "It's your grade. Do what you want." and I have an A+ anyway. He just wants me to do something cool.
Click to expand...
Click to collapse
Have you been watching the tech news about CM? Check it out and you will know. No I don't use miui they are right there with cm.
As for something cool I guess you could try a remote login to your pc to recover missing homework or something of that nature.

zelendel said:
Have you been watching the tech news about CM? Check it out and you will know. No I don't use miui they are right there with cm.
As for something cool I guess you could try a remote login to your pc to recover missing homework or something of that nature.
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Click to collapse
I mean, yes, CM has screwed up a little in the past few months, I agree, and the weird shenanigans with OnePlus were a little sketch, but I don't think it's worth criticising.

AndrMatr said:
I mean, yes, CM has screwed up a little in the past few months, I agree, and the weird shenanigans with OnePlus were a little sketch, but I don't think it's worth criticising.
Click to expand...
Click to collapse
Have you seen their latest of wanting to take android away from Google? Do they not realize that if Google stopped pushing code to aosp they would die off completely. Then adding in untested code that causes tons of issues, forcing some of their developers to close source their apps so they can make money off of it. Yeah they deserve it. To the point that main aosp based roms have stopped using their sources and are ditching their theme manager.

AndrMatr said:
What would happen to my phone if I completely submerged it in cranberry juice? I'm trying to pass a Chem class and the professor wants me to do something impressive with my phone since he sees me on it all the time. I showed him Cyanogenmod and the like but he's not fazed. He's like, 75 and doesn't understand computers. I don't know about the electrical capacitance of berry juice so I was wondering if I put my myTouch 4G Slide in a clear bucket of cranberry juice whether or not it would still be on while in the juice.
Click to expand...
Click to collapse
Assuming you have done a unit on electrochemistry....why not make a battery to charge your phone.

justmpm said:
Assuming you have done a unit on electrochemistry....why not make a battery to charge your phone.
Click to expand...
Click to collapse
Ah, I see what you mean, but no, we haven't yet. I guess I could do the thing this gal did here:
https://www.youtube.com/watch?v=9_LLj4_3ZRA
This might win.

AndrMatr said:
What would happen to my phone if I completely submerged it in cranberry juice? I'm trying to pass a Chem class and the professor wants me to do something impressive with my phone since he sees me on it all the time. I showed him Cyanogenmod and the like but he's not fazed. He's like, 75 and doesn't understand computers. I don't know about the electrical capacitance of berry juice so I was wondering if I put my myTouch 4G Slide in a clear bucket of cranberry juice whether or not it would still be on while in the juice.
Click to expand...
Click to collapse
You could "do something impressive" within the bounds of Chemistry. Dunking a phone in cranberry juice (or any other flavour) isn't impressive at all. I see someone already suggested making a battery...

MiyagiSan said:
You could "do something impressive" within the bounds of Chemistry. Dunking a phone in cranberry juice (or any other flavour) isn't impressive at all. I see someone already suggested making a battery...
Click to expand...
Click to collapse
Look at post #8

AndrMatr said:
Look at post #8
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Click to collapse
Is that what you've settled on?
If so, onions and proper leads can give you an eye-wateringly bigger jolt than citrus fruits... :crying:

Please do not put your perfectly good phone in cranberry juice.... please.
Instead do this....
Get an old charging cable you don't care about (a lot cheaper to destroy)....
and show you can charge your phone with a make-shift battery.
Whatever battery you make I recommend using a diode connected transistor or some kind of a limiter to limit current to your phone so you don't burn it out incase you make some awesome kind of a bad ass battery.
That will impress your professor.
Tips:
You can make a fruit battery out of:
Four lemons (the bigger and juicier the better)
Four pennies
Five zinc-galvanized nails
Five sets of alligator clips
but I'm not sure if the mA would be enough to charge your phone but it will be enough to power a small LED.

TryHardBlueonMac said:
Please do not put your perfectly good phone in cranberry juice.... please.
Instead do this....
Get an old charging cable you don't care about (a lot cheaper to destroy)....
and show you can charge your phone with a make-shift battery.
Whatever battery you make I recommend using a diode connected transistor or some kind of a limiter to limit current to your phone so you don't burn it out incase you make some awesome kind of a bad ass battery.
That will impress your professor.
Tips:
You can make a fruit battery out of:
Four lemons (the bigger and juicier the better)
Four pennies
Five zinc-galvanized nails
Five sets of alligator clips
but I'm not sure if the mA would be enough to charge your phone but it will be enough to power a small LED.
Click to expand...
Click to collapse
Yeah, I wasn't thinking of a fruit battery, more like an old school voltaic pile made out of coins (like pennies) or metal disks from the hardware store. Depending on which metals and electrolyte you use, you should get 0.5V to 1V per "cell". The diode transistor is a super good idea, and you probably will need a voltmeter to determine how many volts your battery is producing and you should also be able to determine the mAmp being produced. Look at the specs of your the charger for your device and just make sure you don't go over the current or voltage specs. My guess is that you will not be able to generate enough current to fully charge your device, so I would leave it off and just try and get the "battery charging" display to light up for a bit. If you go down this route, be prepared to answer some "chemistry" teacher type questions. The more you know the more impressed your teacher will be.

MiyagiSan said:
Is that what you've settled on?
If so, onions and proper leads can give you an eye-wateringly bigger jolt than citrus fruits... :crying:
Click to expand...
Click to collapse
Well, then, I planned to do something with something related to that. I just might use pennies, foamboard soaked in vinegar, and zinc discs.

justmpm said:
Yeah, I wasn't thinking of a fruit battery, more like an old school voltaic pile made out of coins (like pennies) or metal disks from the hardware store. Depending on which metals and electrolyte you use, you should get 0.5V to 1V per "cell". The diode transistor is a super good idea, and you probably will need a voltmeter to determine how many volts your battery is producing and you should also be able to determine the mAmp being produced. Look at the specs of your the charger for your device and just make sure you don't go over the current or voltage specs. My guess is that you will not be able to generate enough current to fully charge your device, so I would leave it off and just try and get the "battery charging" display to light up for a bit. If you go down this route, be prepared to answer some "chemistry" teacher type questions. The more you know the more impressed your teacher will be.
Click to expand...
Click to collapse
That's exactly what I was thinking. The fruit trick is used too often and has lost its value.

TryHardBlueonMac said:
Please do not put your perfectly good phone in cranberry juice.... please.
Instead do this....
Get an old charging cable you don't care about (a lot cheaper to destroy)....
and show you can charge your phone with a make-shift battery.
Whatever battery you make I recommend using a diode connected transistor or some kind of a limiter to limit current to your phone so you don't burn it out incase you make some awesome kind of a bad ass battery.
That will impress your professor.
Tips:
You can make a fruit battery out of:
Four lemons (the bigger and juicier the better)
Four pennies
Five zinc-galvanized nails
Five sets of alligator clips
but I'm not sure if the mA would be enough to charge your phone but it will be enough to power a small LED.
Click to expand...
Click to collapse
I bought a new phone yesterday, so my old myTouch will be fine to destroy just in case. The camera doesn't work, neither does the flash, or certain other things. I bought it on Amazon for $50.

AndrMatr said:
That's exactly what I was thinking. The fruit trick is used too often and has lost its value.
Click to expand...
Click to collapse
Well if you have voltmeter you can set up your pile and try different electorlytes. Typically the stronger the acid and saltier it is the better. So you can try salt water, distilled vinegar, and salt added to distilled vinegar as your electrolytes and record the voltage/cell for each electrolyte...make a nice table, build your (probably 5V battery) explaining how the table helped you choose what kind to build, make a pretty picture displaying the chemistry involved and badda bing...you are done

MiyagiSan said:
Is that what you've settled on?
If so, onions and proper leads can give you an eye-wateringly bigger jolt than citrus fruits... :crying:
Click to expand...
Click to collapse
Definitely.

justmpm said:
Well if you have voltmeter you can set up your pile and try different electorlytes. Typically the stronger the acid and saltier it is the better. So you can try salt water, distilled vinegar, and salt added to distilled vinegar as your electrolytes and record the voltage/cell for each electrolyte...make a nice table, build your (probably 5V battery) explaining how the table helped you choose what kind to build, make a pretty picture displaying the chemistry involved and badda bing...you are done
Click to expand...
Click to collapse
That's a great idea. I don't have a working camera so I can't take pictures of the process to show you guys...

Related

Does your Raphael heat up while talking?

I have noticed a major heating sometimes when making a phonecall, and I mean it becomes really hot...
Im not using the GPS what seems to be causing overheating to some users.
also please post your radioversion etc if you have this type of problems...
Make sure you don't hold the phone near where the battery is. If you look at the manual you will be exposed to dangerously high radiation levels! If you cover it with your finger or hand the phone module goes into high power mode which could account for the heat problem.
Well yes I did some investigating and it does not happen always. I think it could be happening when taking a phone call after charging. By this I don’t mean it’s hot when unplugging the device, it keeps getting hotter and hotter while speaking.
topspeclt said:
Make sure you don't hold the phone near where the battery is. If you look at the manual you will be exposed to dangerously high radiation levels! If you cover it with your finger or hand the phone module goes into high power mode which could account for the heat problem.
Click to expand...
Click to collapse
What, my package and manual are put away. Sorry, I didn’t understand 100%, where I can’t place my finger exactly?
I looked at the manual and did not find anything unusual… What did you mean?
There is a wiki nearby, with links to the on-line manuals
(the part below the battery is where the antenna is )
Ok now that you said antenna I found the part from the manual, if you look at the previous post he says only don’t hold your finger near the battery…. The battery is ½ of the phone…
But seriously am I the only one that thinks this is TOTALLY crazy that if you hold your phone normally from the bottom half you will be exposed to DANGEROUS LEVELS OF RADIATION??? I have had mobiles for 15 years and this is the first one that cant be held in your hand without looking how you hold it…
Are others also experiencing overheating sometimes?
Yep, I said 'battery' - if you look at the picture in the manual (page 10 - see attachment below). The danger zone is bottom 1/3 of the back surface area.
As far as i'm concerned this device should not have had certification and approval for use because NORMAL handling includes the bottom part of the phone. They expect you to be at least 1.5cm away from it too so in practical terms it is extremely difficult and inconvenient to hold. If you hold the top part your palm will cover or get near the bottom anyway so their constraint is ridiculous.
I wasn't aware of this when I first used the phone and I remember my fingers getting hot with a sharp pain.
This device should therefore NOT have safety approval because the context of operation does not include normal and reasonable handling.
So you have to ask yourself: is the HTC Touch Pro worth getting cancer over?
Yes I found that page after I searched the manual "antenna"... That just sounds crazy to me...
But still I don’t know did the SERIOUS overheating I had resulted from that. I couldn’t replicate it... It could be it was caused by the charging before I answered.
I have to pay more attention to that, because I think I had it happen before also.
excuse me, topspeclt, but if you are that worried, why do you use a mobile phone
The top of the phone got really hot. The steel around the camera lens was so hot I could not keep my finger over it… I don’t know, am I the only one experiencing this type of behaviour?
karloe said:
excuse me, topspeclt, but if you are that worried, why do you use a mobile phone
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Click to collapse
I used a Nokia N73 prior to this and no probs. So I'm in for a little dosage. But the handling contraint with the TP is a joke. I end up using the headset now because I can't maintain the ridiculous holding position without receiving hazardous SAR levels.
My observation is one that affects ALL users of the HTC TP and not necessarily other brands.
Had I known this BEFORE I bought the HTC TP I would have skipped it. Damn good for nothing 'Reviewers'.
Loco5150 said:
The top of the phone got really hot. The steel around the camera lens was so hot I could not keep my finger over it… I don’t know, am I the only one experiencing this type of behaviour?
Click to expand...
Click to collapse
That doesn't sound right at all. My TP doesn't get that hot. You might want to swap it (if you can) or call HTC support.
I have to duplicate it and see when exactly it happens…
I’ve noticed it happening few times, but didn’t pay that much attention to it because I use the HF when I’m not home. I started to use that a year ago when there was more talk about the radiation. I talk about 2hrs a day, so the tumours are probably on their way already. Its much more convenient anyway to use the HF.
I got full warranty so I will chance the device when I have confirmed this.
I have to say also that I came from Kaiser WAY too soon… I should have given the real cooks and wizards of XDA few months to find and fix the major bugs for HTC (mind you, they are doing it for FREE to them). I just got a too good of a deal; I got this device almost for the price of my old Kaiser.
No one is experiencing heating around the camera flash/lens area when talking?
Plase confirm so I know do I need to return the device.
I have the same problem sometimes. But it is not conected to making phonecalls. I expreienced this temperture phenomen while browsig the web (wifi) and I think some other situations.
I'll keep an eye on that problem and let you know when it happens again.
I had this problem with my xda orbit 2 as well (when using tomtom while the phoen was plugged in for chargching)
Loco5150 said:
The top of the phone got really hot. The steel around the camera lens was so hot I could not keep my finger over it… I don’t know, am I the only one experiencing this type of behaviour?
Click to expand...
Click to collapse
Perhaps a visit to HTC service centre?
I haven't had this extreme heating yet.
The TP becomes warm while charging, GPS use, Wifi, and even calls, but not to that extend that you can burn your fingers on the lense area.
I think your TP has a hardware problem.
Loco5150 said:
No one is experiencing heating around the camera flash/lens area when talking?
Plase confirm so I know do I need to return the device.
Click to expand...
Click to collapse
My first TP have battery problem and really heat up at the camera metal area when using call/apps. I got a replacement and the new unit don't heat up so fast or so much.
First of all, I don't think that you can possibly expose yourself to any dangerous levels of radiation, no matter how you hold your TP. The SAR tests are done anyway with maximum transmit power, so if you hold your phone from the bottom part and so impair the reception the phone gets, you can only get the official specified SAR levels at most. It does increase battery usage (hence not recommended), as the phone needs to use more transmit power, but the SAR levels are definitely safe - always at or below spec. The design were the phone antenna is at the bottom of the phone is actually very advantageous from SAR point of view, because the antenna element is further away from your brain --> less radiation. However, I do agree that for best reception (holding the phone from the upper part) the handling of the phone is a bit awkward. HTC probably just put the "dangerous levels of radiation" warning there to keep off any possible Americans waiting to sue their a**
Also, looking at the back part of my TP, it seems that the Wifi and GPS antennas are at the top of the phone, so getting hot around the camera lens/upper area while using these features should be expected. Again, I think this is actually quite a good setup, as the phone and wifi/gps antennas are as far away from each other as possible, thus interference between different antennas is kept minimal.
Oh yeah, and you should definitely not burn your fingers on your phone, there's something wrong if you really did (it can get quite warm, but not that hot).
Just my 0.02
My TP aint that warm, but it does get a little warm when playing games but not hot, only a bit warm.
Time to put fans into mobile phones

Is this thing supposed to get burning hot?

Like, even just using it as a phone, it heats up. Is this normal?
I get the same thing, it gets really really really hot. When I use it as gps, or go online especially.
yeah, its normal. never heard of it not happening
I cooked breakfast on mine this morning.
I put mine in my pocket... made myself sterile.
Brendo said:
yeah, its normal. never heard of it not happening
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Click to collapse
I've got a Fuze and it was white hot too. I took it back after about a week and just got a replacement. This new one is not heating up. Although now the problem I have with this one is the 3G connection is not as strong as it was before AND google maps doesn't work for sh!t!! I'm looking for a fix.
Marc
Sounds like your 3G isn't really connecting, make sure you try all the forum posts on enabling and forcing 3G/HSDPA connections. Whenever I run mine on 3G it becomes a nice little hand warmer. Force it down to GPRS and it's not hot and has a useless data connection (but good for when the battery is almost dead).
Brendo said:
yeah, its normal. never heard of it not happening
Click to expand...
Click to collapse
Normal? Extreme heat in an electronic device is normal? I don't think so. If any device you have is getting warm enough to be of concern TAKE IT BACK AND EXCHANGE IT!
BTW - mine doesn't get hot. I can feel warmth if it's charging, for instance, but I wouldn't call it hot.
The Norm
thehyecircus said:
Like, even just using it as a phone, it heats up. Is this normal?
Click to expand...
Click to collapse
Pretty much yes they do especially when using heavy power draining functions ie: Wifi, GPS, etc.
Some of the claims here of cooking breakfast, becoming sterile maybe slightly over the top and I have never been actually burnt by the device. But I have yet to use a HTC device that did not get hot when using the above functions for a period of time.
Just my experience and I certainly would not be using one if it boiled my nuts.
It´s not normal for a electonic device to become that hot, some heat is normal but not EXTREME HEAT!
Try flashing another radio and see if that helps, if not then you should send it back for repair!
Err
branko.savic said:
It´s not normal for a electonic device to become that hot, some heat is normal but not EXTREME HEAT!
Click to expand...
Click to collapse
mmmm, ever put something made of plastic near the heat exhaust vent on your laptop?? Most modern electronic devices that are based on a CPU generate exteme heat that is why they have cooling, heat sinks, etc.
I'm certainly not going to get into an argument about this but the bottom line here is that they do generate certain levels of heat. It definately should not be enough to burn you though.
BlueAnt1958 said:
mmmm, ever put something made of plastic near the heat exhaust vent on your laptop?? Most modern electronic devices that are based on a CPU generate exteme heat that is why they have cooling, heat sinks, etc.
I'm certainly not going to get into an argument about this but the bottom line here is that they do generate certain levels of heat. It definately should not be enough to burn you though.
Click to expand...
Click to collapse
Yes but a laptop has X amount more power then a phone! And you know, if the laptop didnt have a FAN to cool it down it would not last you even a few minutes!
However, our phones are designed without fans and are not supposed to get EXTREMLY HOT!
Let´s face it, no electronic device should get extremly hot, if it does then something is wrong, or something will be wrong with it soon!
Mine gets warm, but never hot even when using the GPS or wifi for over an hour. During a 20 minute telephone conversation it will get warm, but again not hot.
after 20 min of phone call, connected to wifi, on ac adapter, it got warm, never hot.
the hottest mine got was looking at vid porn via SkyFire browser. It looked really great... but oh man... the phone was sizzlin'.
Well I don't know if my phone is getting warm or hot. It's not an unpleasant warmth, just odd.
And Skyfire? I thought Opera Mobile was the preferred browser of choice.
My phone doesn't get extremely hot, mildly warm while surfing net over 3G, but that is it.
thehyecircus said:
Like, even just using it as a phone, it heats up. Is this normal?
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Click to collapse
This is absolutely not normal and is one of the reasons i returned mine and went back to my Treo. I've used lots of high end phones and this is the first and only one that just starts toasting by itself when doing simple stuff.
Strange thing is that everyone i know with a T.P complains about the same thing. I could be watching Youtube for less than 5 mins and it starts boiling..what gives. I Youtube on my Treo (via Coreplayer) and it never gets hot.
I'd say this is a problem or issue with most of all T.Pro's. Sad really, such decent hardware specs.
I've also been experiencing heat coming from the back of the device, but only when I hold calls over around 15 minutes or if I'm using the internet extensively. I also notice it can create a good amount of heat when it charges. Usually when electronic devices have excessive heat it's due to a build up of dust.
LordLugard said:
This is absolutely not normal and is one of the reasons i returned mine and went back to my Treo. I've used lots of high end phones and this is the first and only one that just starts toasting by itself when doing simple stuff.
Strange this is that everyone i know with a T.P complains about the same thing. I could be watching Youtube for less than 5 mins and it starts boiling..what gives. I Youtube on my Treo (via Coreplayer) and it never gets hot.
I'd say this is a problem or issue with most of all T.Pro's. Sad really, such decent hardware specs.
Click to expand...
Click to collapse
So what am I to think? I have a few guys telling me NO! And the rest of you saying "It's normal" and ONE guy saying he exchanged his in and his new one DOES NOT GET HOT AT ALL!!!
what the hell!! I have like two weeks until my 30 days is up.

Hd2 Screams when dropped (IDEA)

So, may be this is dumb, i thought of it last nite though..
You know that feeling, you just pulled you phone out of your pocket a tick too fast, or tred to do somethihg else at the same time, and it slips... those moments between your device leaving your hand, and it meeting the ground are lasting for hours... and theres nothing you can do.
but maybe this will make it a little better (probably) so that if you drop your phone, or you g sensor detects 0-g, (zero gravity , as would be by free falling) that it would activate an app that has a voice and it would scream in terror.
it sounded better last nite after a couple drinks.. a couple more dirnk it its gonna start sounding better again.
but i thought it would be fun... keeping it running in the background, overrides any system sounds and would play on the speaker loudly. ...
but , just an idea.
would be cool to see in action though.
thanks for listening!
Try taking more water with it...
Are you volunteering for the testing phase?
Gustopher said:
Try taking more water with it...
Are you volunteering for the testing phase?
Click to expand...
Click to collapse
LooooL I down for the idea but lets leave the test to this guy
Gustopher said:
Try taking more water with it...
Are you volunteering for the testing phase?
Click to expand...
Click to collapse
i would test it if someone would write it, but i don't wanna mess up my system, because i'm not exactly an expert in ROM flashing (Ive never done it before) and things like this, so if something goes wrong, i am gonna need help to fix it.
of course i wouldnt drop my phone on the street, but onto a bed or something for testing/playing with it.
saintnickxiii said:
it sounded better last nite after a couple drinks.. a couple more dirnk it its gonna start sounding better again.
Click to expand...
Click to collapse
Haha! That's an awesome idea!
this is the only app i definitely wouldnt test lol
i would defintely test just dorp onto a quilt or summut no real big deal
johnhob said:
i would defintely test just dorp onto a quilt or summut no real big deal
Click to expand...
Click to collapse
exactly, someone would have to dumb to actually test it on the ground...
but i think on a bed/pillow should be no problem. and if it is, then i own the wrong phone.
How about gurgling when dropped down the toilet?
If i dropped my HD2 i would be the one screaming, not the phone...
Popeyes_Rat said:
How about gurgling when dropped down the toilet?
Click to expand...
Click to collapse
Buahahhaa, Epic for me
Gustopher said:
Are you volunteering for the testing phase?
Click to expand...
Click to collapse
if anyone develops that, i'm up for testing it!
LOL
Sooo.... many people would actually run an app, for ever, eating memory and CPU cycles, as well as keeping the phone permanently out of standby (needed to continuously sample the sensor) thus reducing battery life to about 15hrs max without touching it, just so that in the event they dropped their phone one day in the couple of years they'll have it it would scream during half a second before hitting the ground and breaking?
I wonder where the world is going...
Nice idea, but
Honestly, I wouldn't mind developing that one. Sounded easy at first too. But think, the accelerometer meaures 2 axis ( if i'm not mistaken ). How could you tell the device is on a free fall? When it falls, it usually spins, so, tecnically as far as the sensors are concerned it's not on a free fall, as the sensor reads some values, that are consistent with some one handling the device. So, the risk in developing an app like this is having an app that gets the phone to scream whenever it's moved, or never scream at all (not even when falling!)
But please, do prove me wrong ^^. Cause regarding accelerometers i've only worked with the iPhone SDK (Yeah, i kno, but it's job related).
ei05035 said:
But think, the accelerometer meaures 2 axis
Click to expand...
Click to collapse
3 actually.
ei05035 said:
How could you tell the device is on a free fall?
Click to expand...
Click to collapse
All axes = 0 (or close to it).
Opps, my bad about the number of axis.
But still, all axis at 0? seriously doubt that, since the device usually doesnt fall on a perfectly vertical trajectory. It usually spins around...
At least, when on the G Sensor calibration tool i can see the meters moving around when i throw my device up in the air :S
ei05035 said:
the device usually doesnt fall on a perfectly vertical trajectory. It usually spins around...
Click to expand...
Click to collapse
well, then one could maybe develop the program to read erratic behavoir, when all the sensors are spinning, (?) because to do that my mistake isn't easy i imagine, and it would maybe also activate when bouncing around in a bag(purse, briefcase, who knows what...) in any case, it would scream when in situations that aren't healthy for the phone. (running to catch the train and its bouncing in your backsack for example)...
we now have a purpose to this app... (other than scaring the **** out of you twice ((your phone is about to break, and its screaming!)) HA!
It will probably spin around, but normally not so much as to create close to 1g. It obviously depends on the position of the accelerometer in the device, and I don't know where it is in the HD2. But supposing it's in the most defavorable position (at the edge, 6cm from CG) simulating gravity would mean the phone would have to spin 2 revolutions per second. With greatly reduced effect if it's actually closer to the CG.
twallden said:
If i dropped my HD2 i would be the one screaming, not the phone...
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Click to collapse
lmfao true true i agree with u there

Battery Life Management Questions from a Smartphone Newbie

Hi everyone, I am a pretty technically savvy person, but a newbie to the world of smartphones. I just got a MT4GS this week and have been getting used to it for the past few days. My main concern is the battery life - understandably, compared to my old feature phone, the smartphone is going to use a lot more juice. I just wasn't expecting to charge it overnight, have it plugged most of the day at work, and still be down to ~70% power by the time I get home. I'm not even doing anything that intense with it. It worries me to think that my phone might die on me if I'm out somewhere for the day. And what is the point of having a phone that can run programs and do all these great things, if you're afraid to use it?
After reading around here, I've already picked up a lot of great tips: I ordered a set of the Anker batteries (my phone was purchased used, and while it is physically in great condition, who knows about the battery), and I installed the 2x Battery app. I've reduced my screen brightness; turned off background data; turned off GPS; and when I'm on WiFi, I have 4G off, and vice versa.
A couple of questions:
1) Without doing anything crazy to the phone or default OS, is there anything else you recommend doing to conserve battery life?
2) In 2x Battery, there is a setting "Pause when WiFi on." The description here is kind of confusing, and I can't tell if it's working or not. If I want the mobile data connection off when connected to WiFi, do I want this option checked or unchecked? Right now I'm connected to WiFi, but it appears that mobile data is on whether this box is checked or not.
Thank you so much for all the great info so far, and for any advice you can offer me )
Well, firstly, good call on the anker batteries. I have one, and it's changed my life with this device. I went from being exactly as you described (scared to go somewhere without knowing exactly where my next source of power was) to not paying it much mind.
Secondly, if you are unrooted stock - then you have a whole lot of apps working in the background and conspiring together to drain your battery. ...and there's nothing you can do about it because both T-Mobile and HTC saw fit to place them there, running around the clock and beyond your control.
This is known as bloat, and on this phone it's beyond out of control. It's out of control on other phones, but they took it to a special place of exasperation on this one.
I am not sure about this 2x battery app you're speaking of, i've never used it. Consider this, though, it's one MORE app running on your device and draining your battery - and if you are stock this may be something you can ill afford.
As far as the wifi/data dance, this is nothing more then a feel-good measure that really isn't doing anything for you except adding to your interaction with the device. The time your screen is on to make that change takes more battery use then you would save on several hours of having one or the other switched off.
Check this link below (another XDA post):
Everything you wanted to know about Li-Ion batteries but were afraid to ask!
...and it may help you out with battery care.
For me, running my custom ROM with an anker battery and all the apps/widgets I prefer to use I can get 6-8 hours out of a charge on the anker battery with semi-steady usage.
This is with both wifi, mobile data and background data on, and the screen on but at mostly dim brightness for 4-5 of those 6-8.
If I overclock the processor to 1.7Ghz (stock it stops at 1.2Ghz) and hook it up to a television using a playstation (game console) emulator...running flat out at full speed I can drain the (anker) battery in as little as 3 hours.
Something that may interest you as time wears on and you get used to having the anker batteries and using them is what is mentioned in this thread:
external battery pack! Awesome!
...and there are many out there and good deals to be had on some, poke around a bit and you'll find one suitable if such is your desire.
One last thing to consider - make sure you are using the proper charging port.
Most USB ports on computers only push half an amp, as well as nearly every single secondary port on chargers (think car chargers with an 'extra' USB port). Half an amp is not enough current to charge the device if being used, and barely enough to see positive battery increase if not.
Make sure whatever you plug into is pushing 5volts 1amp, or you'll see your battery level continue to drop as you are charging.
(oh, and GPS is something you WILL see more battery life from turning off if not using - so having something like a soundhound app widget on your home screen with location on will eat your battery before you know it's gone by activating the GPS.)
Dimming the screen if possible will see you the greatest gains in battery life, and then getting rid of any apps you can that are running in the background is the next biggest step - but again, if stock and unrooted there is only so much you can do on app management.
DON'T USE TASK KILLERS - EVER. (they do much, much more harm then any falsely perceived good you may think you are getting from them.)
Recap:
Screen = biggest battery drain.
GPS chip/use = second biggest drain.
Apps in background = third biggest drain.
Wifi/mobile data = negligable drain.
Hope this helps a bit.
Edit:
Oh, and welcome to XDA!
Blue pretty much covered everything that I was going to say. I also have the Anker battery, and I also have the Anker 5600 mah external battery, and I no longer have battery worries. I choose the Anker external battery over the other ones because of its small portable size, even though some of the other ones have more capacity. I find that I can get about two full charges of my phone with it, and it is small enough to fit in my pocket or purse with no problem. I highly recommend an external battery just for piece of mind, knowing that I no longer have to be searching every place I go for an outlet. I love that I can charge my phone while it is in my pocket or purse. Also the price isn't too bad, I bought mine for about $40, but I see Amazon now has it for $33. I bought it from a company called Laptop Mate on Amazon, and it was shipped amazingly fast even though I just got standard shipping. Laptop Mate then said if I wrote a review I could choose a free gift. The gifts were not anything spectacular, but the gesture was nice. At the time I could choose between a usb powered reading light, a card reader, and I forget what the other one was. Again nothing great, but it was just a nice bonus, I will definitely buy from that company again. So with my Anker internal battery, and my external battery, I could reasonably not have to plug my phone into the wall for at least two days, I could stretch it more if I was camping or something. I really like keeping my screen at full brightness, so that is where most of my drain comes from. Well, sorry for the long winded response, and welcome to XDA. I bet that in a month you will wonder what you ever did with out a smart phone.
http://www.amazon.com/Anker-Externa...on/dp/B005K7192G/ref=pd_rhf_gw_cpp_tab0_p_t_1
Thank you so much for your very thorough responses! I am happy to report that since making a few little changes (turning down my screen brightness, turning off the background data sync), performance is already noticeably better. Yesterday I was on battery power for close to 14 hours, was on and off WiFi, talked on the phone probably a couple hours total, and used it what I would consider a "normal" amount (e-mail, photos, some social networking)... and still had ~50% power left by the time I went to bed. That is much more reassuring to me, and I can only assume performance would get even better once I get those new batteries.
I understand about the "bloat" and having all these extra things running, but I think doing anything with the ROM is a little above my expertise at this point. For now, things seem to be working reasonably, so we'll see...
I like the external charger idea, but I am going to hold off for now. I ordered the 2-pack of Anker batteries, so once I get those, I'll have 3 batteries. One should be fine for a normal day, and if I'm really going to be out for a while and not have any opportunity to recharge, or will be using the phone a lot, I could just bring along a spare or two. (Good thing I am a lady with a purse - what do guys do?! Carry a man bag? My husband is considering getting the same phone, so this is a valid concern.)
I'm apparently too new to post a link to 2x Battery, which I've seen mentioned elsewhere on this board, but that's the name if you want to look it up in the Android Market. Even if it is using a little more battery power, I think it's worth it. It puts controls for things that use battery power all in one place, and it makes it very easy to monitor the current battery status. I think I'll stick with it, at least until I get a better sense of how my use affects the battery.
Per the question of a man hauling batteries, I just carry a spare battery or two I'm my front pocket. If I am carrying keys I will slap a piece of tape accross the terminals to prevent a short. One or two guys carry their spare gear in a camera case. I can haul most all I need in a corner of my Levi's front pocket.
I also used to run Juice Defender, it got irritating waiting for the data connection to spin up and the benefits were outweighed (IMHO) by the downsides. Killing data every time the screen turns off was grim.
Hastily spouted for your befuddlement
I have a zipper case I keep the phone in, and it's not much larger then the device itself. Above and beyond keeping dust out ( primary function ) it also has a small pocket on the outside I keep a few knick-knacks in, like a retractable micro-usb cable, backup memory card ( recovery purposes) mini flash drive and spare battery.
I highly recommend some kind of small zipper case for the device to keep out the dust, best $10 investment I've made for the phone.
Not in a position to link pics at the moment, but I'll do so over the next few days when I get the chance - especially floating loose in a potentially dusty purse it's something to consider.
I wish the video cable was something I could cram in to it as well, but that presents too much bulk for it to work, I have a mini camera case I carry sometimes with the A/V cable, AC adapter, another micro-usb cable and some memory cards and flash drives - something to consider for yourself for carrying cables and such since you most likely have room in your purse for a mini camera case with such things.
Sent from a digital distance.
Thanks for all the carrying tips!
Blue6IX said:
I highly recommend some kind of small zipper case for the device to keep out the dust, best $10 investment I've made for the phone.
Not in a position to link pics at the moment, but I'll do so over the next few days when I get the chance - especially floating loose in a potentially dusty purse it's something to consider.
Click to expand...
Click to collapse
I'm not really worried about my own phone, it has its own little pocket inside my purse, and I don't know what kind of ladies you hang out with, but my purse is not dusty...
Please forgive - I meant no offense by it.
I threw in the word potentially because while I have seen some pristine purses, i've also seen some which haven't been vacuumed out in a long time, if ever. The very fine dust that gets in during the course of normal travel is what our enemy is here. (...and yours may be vacuumed out on a consistent basis, really only you can know.)
This need not just be dirt, even the fibers of the material wearing off in tiny fractions of an amount from simply carrying it around (material rubbing against material as it's shape stretches, bends and contorts) is enough to be a hazard to the device. Over time this adds up.
(though, saying it has it's own pocket/pouch within the purse itself lends a good deal more protection and paints a much better picture then the previous blanket statement of 'in my purse')
Due to the slide mechanism and the exposed back of the LCD screen it is very easy to get dust under the screen, in between the layers of it.
Slide it open with the screen at max brightness, then flip it over. Look at the very end of the slide channels on the screen side, from an angle on the side. You will be able to clearly see the light shining through opposite the T-Mobile branding on the backside of where the genius button is. Look past the greenish tint and see the whitish light, noticing how it extends inwards.
You can now look at the other side, right by the T-Mobile branding in the same spot and though you can't see the light shining through, you can see how very fine dust can work it's way in between the digitizer and screen.
'Dust under screen' is something that people who post here at XDA have made warranty exchanges over, as well as who knows how many who don't post have done. It's a valid exchange gripe that is in fact covered under warranty from what the people who have posted about it have led us to believe. There are also plenty of 'dust under screen' doubleshots on reduced price on ebay that you could look up this very moment.
Again, I meant no offense, but was simply trying to use the situation presented to illustrate a potential hazard your new device could fall victim of. Hopefully by bringing it to your attention you can take steps to minimize any damage, or at least present you with the opportunity to later be in a situation of:
'Oh well, at least I knew it was coming'
...as opposed to:
'Wow, I wish I knew that could have happened'
We only wish you to get the best experience possible from your Android, and while there is a lot of important info here...'tis easy to become overwhelmed by it all and miss some of the important things that could help you immediately, or should be known immediately.
Glad to hear you are already in better straights over the management of your available power!
By the way - thanks for endeavoring to clarify the app you were using for battery management, i'll definitely scope it out when I get a chance.
Blue6IX said:
Please forgive - I meant no offense by it.
Click to expand...
Click to collapse
None taken, I just thought it was funny
Thanks for the tips about dust, though. That wasn't something I had really considered, though I'm hoping to get a bit more life out of this phone than my last few (cheap, and switched on a whim), so I'll be sure to keep things clean. Is it ok to spray the back of the slide-out with some compressed air, or could that cause other problems?
Little update:
I did use a little compressed air to clean out the back of the phone, so hopefully I didn't hurt anything.
Two different cases are on their way to me - I'll see which I like more and return the other.
I've had the Anker battery in for just a couple hours, and it's already amazing! I've been using the phone a decent amount, turned on notifications and everything I'd switched off, and it's still at 100%! Also feels much cooler than the other battery. It was a tight fit, like everyone said, but I did get it in and fit the back cover over it.
But, weird thing: when I turn the phone sideways, the screen no longer rotates. It will still rotate if I slide the keyboard up, but otherwise it's like it doesn't recognize that the orientation changed. Did the battery mess something up?
The screen didn't rotate on it's own unless you slid the keyboard out if you are using the stock launcher - you may have made the same mistake I did in thinking it was so, but it wasn't.
Home screens, in the app drawer...etc... not made to auto-rotate.
You just happened to finally realize it - same thing happened to me.
I even argued against it, and couldn't figure out why it was changed.
A while later while I was going through the code that comprises Rosie (sense launcher) I actually saw that it wasn't made to do so.
So no, the battery didn't mess this up, it's the way it was supposed to be.
The reason for it is there is an alignment issue with some widgets when it switches from portrait to landscape in Rosie. I'm not sure how to fix it the way they have it coded, i've been scratching my head on this one for a while and tried a few things with no success.
HTC could learn a few things from some aftermarket app designers ( like the team that made GO launcher, for instance)
The way they built it, I don't think it's possible to fix their mistake, it's too interwoven and embedded in the design of the code.
Edit - it still and always has, autorotated while you are in apps themselves if they support it.
Oh you're right! That's funny, I never noticed before. In other apps, the screen does rotate normally, so I guess all is good...
Going on 12 hours with this battery, with all notifications, synching, etc. turned on, and I'm still at 67% ... And this is right out of the box, without the 4-5 cycles they recommend. I'm very happy with it so far!

How much pressure can a screen take? Can I rest my head on it?

Not as weird as it may seem
At night I listen to music/radio while I go to sleep. I use a cheap phone at the moment but was thinking about getting a 2012 Nexus 7 that I can use for this (and actually use it as a tablet as well)
Will it be okay if it's under my pillows or will the weight/pressure damage the screen?
Thanks in advance :good:
technicalnoobxda said:
Not as weird as it may seem
At night I listen to music/radio while I go to sleep. I use a cheap phone at the moment but was thinking about getting a 2012 Nexus 7 that I can use for this (and actually use it as a tablet as well)
Will it be okay if it's under my pillows or will the weight/pressure damage the screen?
Thanks in advance :good:
Click to expand...
Click to collapse
Lol your tablet will be fine haha unless you're head is the size of 3 watermelons and weighs 50 pounds then but seriously it won't cause any problems
the question is more about how much damage will the mobile make to your head if the wifi/cell network is running trough your head all night?
except you run radio by earphone receiver with airplane mode on..then never mind
crzykiller said:
Lol your tablet will be fine haha unless you're head is the size of 3 watermelons and weighs 50 pounds then but seriously it won't cause any problems
Click to expand...
Click to collapse
Thanks
deprite said:
the question is more about how much damage will the mobile make to your head if the wifi/cell network is running trough your head all night?
except you run radio by earphone receiver with airplane mode on..then never mind
Click to expand...
Click to collapse
How much damage will it do?
You should be fine. Did that on a plane once, the biggest damage was the droll lol.
technicalnoobxda said:
Thanks
How much damage will it do?
Click to expand...
Click to collapse
well there is no official study about that as far as i know..
just know for myself that i sleep better with airplane mode on and all the network stopped
technicalnoobxda said:
Not as weird as it may seem
At night I listen to music/radio while I go to sleep. I use a cheap phone at the moment but was thinking about getting a 2012 Nexus 7 that I can use for this (and actually use it as a tablet as well)
Will it be okay if it's under my pillows or will the weight/pressure damage the screen?
Thanks in advance :good:
Click to expand...
Click to collapse
I use a quality speakerpillow, it has a long enough lead that I don't risk the phone/tablet and I can rest directly on the speaker and keep volume low and not disturb my partner.
Sent from my A210 using Tapatalk
Better sleep, huh?
technicalnoobxda said:
Not as weird as it may seem
At night I listen to music/radio while I go to sleep. I use a cheap phone at the moment but was thinking about getting a 2012 Nexus 7 that I can use for this (and actually use it as a tablet as well)
Will it be okay if it's under my pillows or will the weight/pressure damage the screen?
Thanks in advance :good:
Click to expand...
Click to collapse
Ha ha... That is really a funny question. But it should be answered. It won't damage your phone unless you move the pillow below your head above your tablet. Use a good cushioned pillow though.
And yes, do turn the airplane mode on. Radiations are not good for your brain. (I'm not expecting more such questions :laugh Just kidding brother.
Ohhh God. Why are we discussing about it? Doesn't it come with Gorilla Glass?
Probably you will have to worry not tossing the phone down to the floor while you sleep.
why you just don't do that and but your phone beside your below
Just buy a quality pillow speaker , then you dont have to worry about getting tangled up in headphones cables aswell
I really wouldn't worry about it for clarifications sake and a technical answer to your questions your main concerns would come from the stress your head would apply to your phones screen. More particularly the relation between the compressive force your head creates and the maximum compressive strength of the material in question before failure of that material under load. (Stress= F/A) The Nexus 7 uses Corning Gorilla Glass which has a maximum compressive strength of 800 MPa. That's 224,808.944 pound-forces per meter^2 and your head does not exert anywhere near that number.
Like I said you really have nothing to worry about you won't damage your screen by laying it under your pillow.
I'm surprised no one brought up the very real possibility of overheating. Sure, you can rest your head on it - but you're smothering it under a pillow and not allowing for the heat it will generate to dissipate.
It would be especially bad if you were charging at the same time - and either way not something I'd recommend anyone do. Why shorten the lifespan of your device by exposure to high internal temperatures if there are other options (like using it with a pillow speaker instead).
Or you could get a wireless headset?

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