Related
Hello:
I built myself a car charger a while ago and it all seemed to work fine. A couple of times however my unit has 'died' after a particularly long journey in the car. I have recently discovered that it was actually getting flat enough to turn off and not turn on until charged; even though it was indicating it was charging.
Further experiments have revealed that if the battery in nearly full (eg 84%) and I use my car charger, the percentage of battery full increases over time indicating it is indeed charging.
However; if the battery is quite empty eg 24% - over time the battery charge decreases until the unit turns off, and needs to be attached to the mains to charge it - even thought it still indicates it is charging!
Soehere in the middle of the two battery states ( 84% - 24%), my charger seems uable to charge my XDA for some unknown reason, I suspected it could be due to current drain - a flatter battery may need more current to charge which the charger cannot provide, but the same situation occurrs even if the unit is turned of and therefore taking very little current from the car charger - obviously leaving nearly all the current available to charge the battery.
Any ideas why this should happen? I am completely stumped - I do not wish to buy a charger as my charging system also incorporates a connection to my GPS unit, and no commercially available chargers provide this at a reasonable price.
Any help or suggestions much appreciated.
BTW: The PDA will only charge if at least one of the pins 16,17,or 18 isconnected to ground and at least one of the pins 20,21 or 22 are connected to +5V. Otherwise, though the XDA may say it is charging, it will actually just drain the battery.
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Click to collapse
icarusbop,
Have a look at the charger I made for my XDA II, for use with the in-car kit I also made. The schematics are on my web site - follow the link from my signiature below.
This charger works 100%, and the state of the battery has no effect on charging performance. Mind you, it is capable of supplying > 2 Amps which is sufficient to fully charge the battery while watching movies, and the screen brightness turned all the way up. Charging times are the same as using the plug pack supplied with tyhe XDA II, if not a tad quicker.
The only draw back is the heatsink required for the +5 volt regulator. For the smallish one I have chosen (for the car kit - see pic on my site) it is capable of 2 Amps, but with a larger heatsink (see the first attempt pic of this charger) a full 5 Amps is easily achievable over extended use. It all depends on how much juice your set up requires.
Hope this helps.
Recrem...
I have the same issue but I have an original car kit which was working fine. After I upgraded to 2.06.00WWE i noticed that although when plugged into car kit it says charging, it actually discharges. Although I like this version, I'm in the car quite a bit and need the device to charge, and am thinking about rolling back to the latest rom from the club imate site.
It appears to be a software issue more than a hardware issue....
:?
update,
I've discovered that if charged to atleast 90% when plugged into car kit then it charges.
at some level below this (don't know where yet) it discharges.
welcome to the twilight zone
I haven't tested this with my car kit, and haven't noticed any problems when I had SE installed, although my wife said that her device wasn't charging while in the car, and when she got home after a fair drive, her battery was indeed flat!
I rolled back from 2.02 + 2.06 merged SE to my origional ROM of 1.66.00.WWE purely because some problems became more and more evident - like being unable to connect to ActiveSync unless I reset the device numerous times, and spontaneous hard resets. I have all the same software on my device now with the origional ROM and no problems...
We will be moving this week, and it would be a good test for my ROM and charger to see if it charges when below 90%....
Recrem...
microphone
Hi, did you manage to get the mic working on you carkit? I cannot get the mic working when connected with pins 1 and 5. sound output is working however!
Thanks,
Rob Boerman
Did you design and build your own car kit, or did you follow my design from my web site? I am curious if anyone has used the info I have posted there...
Haven't had a chance to try the mic. I only know it will require a good pre-amp to get it working, and I have been too busy to build one yet - perhaps when I have settled down into our new home after this week-end...
Recrem...
let me know
If you find time this weekend let me know
cheers,
Rob Boerman
All
Just to give my two-pennies worth...
I bought a USB cable when purchasing my O2 XDA II from the O2 shop. When using this cable, if the existing charge is below 85% then the device discharges when connected, however, if it is above 85% then it charges quite happily.
Get this.. if I use my USB CRADLE to charge (in the same USB port etc..) then it charges from below 85% without any problems whatsoever!
Is there a possibility that the USB cable and the USB cradle are wired differently? Are we missing a trick here?
My charging issue has deteriorated to the point that it dosn't charge at all in the car kit, it does charge in the pc usb hub and on mains. I down graded to 1.72.00WWE last night and tested it in the car kit this morning and it still discharged, so the software appears to have nothing to do with it.
I think the earlier statement by indecided may yeild results:
"The PDA will only charge if at least one of the pins 16,17,or 18 isconnected to ground and at least one of the pins 20,21 or 22 are connected to +5V. Otherwise, though the XDA may say it is charging, it will actually just drain the battery."
I will pull my gear apart this weekend and test it out. Possibly I've got a bad connection.
davidberrysmith said:
I think the earlier statement by indecided may yeild results:
"The PDA will only charge if at least one of the pins 16,17,or 18 isconnected to ground and at least one of the pins 20,21 or 22 are connected to +5V. Otherwise, though the XDA may say it is charging, it will actually just drain the battery."
Click to expand...
Click to collapse
[Theory] The pins are quite thin, it's hard to think you can push 2+ Amps thru one of them without melting it down (at least the insulation). Maybe this is the problem: if you need a big loading current - like when the battery is below 85% - and you don't have more than one pin pair connected to +/- 5V the phone is not charging, although it may say so.
Solution: connect ALL three of pins 16-18 to GND and ALL three pins 20-22 to +5V.
[/theory]
Solved my problem,...
pin 22 had come away from the circuit board. So I sweated it down and just for good measure sweated down all other connections as well.
Put the phone back together and threw it in the car kit, charge ingreased from 78%.
time to upgrade the os again.
:wink:
david... perseverance does pay off... cool.
hi everybody!
what I really don't like is, that my MDA Comapct is always charged when I connect it with the usb cable to my computer.
as everybody knows every battery, no matter if li-ion or not, gets worse when charged all the time for short times.
does anybody know if theres a program which deactivates usb charging?
thanks for your help!
stefan
Because of that reason i use bluetooth for sincronization, you can do the same. it's a good solution.
You could modify a usb cable to sync only, by removing the power connections I suppose. It could be made switchable also if you are ok with a solder gun.
as everybody knows every battery, no matter if li-ion or not
Click to expand...
Click to collapse
Hi,
interestingly enough, that is not true for LiIon Batteries. The worst you can do is, always decharge nearly completely and then fully recharge. The method that is recommend for all the 'usual' batteries is no good for LiIOn.
http://en.wikipedia.org/wiki/Li-ion e.g.
The dangers of 'deep' discharging are a lot worse than problems with a high number of recharges. The lifetime of a LiIon is NOT dependent from the numbers of chargiong cycles. And with the non-existing memory effect, there is no reason, not to recharge a LiIOn whenever convenient.
So, to summarize, do not worry about charging the MDA via USB.
Regards
marco
Very good link and a very good advice marco99, thx a lot.
As a external powersupply, it says that the capacity is 12000 MAh so enough for 12 charges, or do I make a mistake somewhere?
It seems that a miniUSB connection is suplied whit it so I shouldn't now why it wouldn't do the job and the size is (for me) acceptable with almost 3x3x0,5 inch, I mean for tracking at locations whitout electricity it could keep your GPS going.
http://www.dealextreme.com/details.dx/sku.19086
@hooty
I am sorry forget the link
Willem
Tried what? No link? Product name? Anything?
USB Charging
Not sure about how many times it would charge your diamond...but it looks like it has a Female USB connector so any USB cable could be plugged into it to charge ANY device...if your device allows USB charging that is.
Best regards
Wasim
12,000Mah!?!
Doubt it, must have been some serious squashing to get that much juice in there!
My laptop battery is twice the size of that and has 5100Mah capacity. Would be great to be able to charge it from that thing!
Ill just ordered
I just ordered the battery and as soon as it arrives I will write a review of it.
Willem
I don't think it'll work. There were some user reviews on similar charger saying it won't charge their ppc's through USB.
dervish666 said:
12,000Mah!?!
Doubt it, must have been some serious squashing to get that much juice in there!
My laptop battery is twice the size of that and has 5100Mah capacity. Would be great to be able to charge it from that thing!
Click to expand...
Click to collapse
your laptop battery is also higher voltage, probably 12V.
think of the AA-size NiMh cells, the best ones are 1.2V 2800mAh.. two of those aren't close to the size of a laptop battery and yet they have higher mAh.
but you're right, 12000 mAh in that thing is utterly impossible
edit; anyone tried this?
http://www.instructables.com/id/Portable-USB-Charger-Version-2.0/
edit again; this seems more like a real product, but it's larger than the actual diamond is. not too convenient.
http://www.proporta.com/F02/PPF02P05.php?t_id=4125&t_mode=des
late edit; if a computer usb connection is too weak to charge the diamond, shouldn't it be possible to solder a cable that connects the diamond to two usb ports simultaneously?
Wilsas said:
It seems that a miniUSB connection is suplied whit it so I shouldn't now why it wouldn't do the job
Click to expand...
Click to collapse
I have one of those crummy double A chargers from energiser i got from a friend and using the mini usb included with it, the phone does indeed charge but only when its off. When its on the power its using makes the battery pack redundant, but thats for my crappy charger. I think this should work, and if not it would work for another phone or device.
dagbro said:
y
but you're right, 12000 mAh in that thing is utterly impossible
?
Click to expand...
Click to collapse
I made a small calculation my 2000MAh is in size 40X35X10mm =14000mm3
The size of the 12000MAh is 74,93X74,93X14,986mm=84138,9704314
84138,9704314/14000=6,0099264593857142857142857142857
6,0099264593857142857142857142857 X 2000MAH (which is the size of my battery)=12019,85291877142857142857142857
Acoording this caluculation it should be physical possible I just don't now how much cell it has and neather or by just doubling the size you can double the capacity aswell.
Willem
ShatteredAxe said:
I have one of those crummy double A chargers from energiser i got from a friend and using the mini usb included with it, the phone does indeed charge but only when its off. When its on the power its using makes the battery pack redundant, but thats for my crappy charger. I think this should work, and if not it would work for another phone or device.
Click to expand...
Click to collapse
That's true for another Li-Io-charger which I bought from DealExtreme. From what I can see, they don't check their inventory very thoroughly for function and quality. Most of the stuff is just fine, but there is also some junk - and my Li-Io-charger was among it.
Since they advertise it only for the PSP, I can imagine that it will not offer the high current to charge a working Touch Diamond.
Have fun!
Lost_in_translation said:
T
Since they advertise it only for the PSP, I can imagine that it will not offer the high current to charge a working Touch Diamond.
Have fun!
Click to expand...
Click to collapse
Do you now howmuch is the power use off a PSP?
I do agree with you that not everything is made off gold what they sell at DealExtreme, I also bought already some useless stuff from them but this item should be a verry big mistake from them cause there are rumors at there site about this item, I even doubt about it aswell and thats why I cancelled the order but after I made the calculation I am in doubt again.
I travell a lot and one off the country's which I visit a lot is Brasil and for such a country whit the infrastructure availleble (or just NOT availleble)
If you make a long bus journey or plaintrip (Brasil is at least 12 hours where in you have nothing to do) or even in the bush or just tracking such a item could be ideal.
Willem
After a email with my doubts Deal extreme send me the folowing message, in a previous message Itould them about the doubts and asked them to check or the ordered battery is realy 12000 mAh, they have checek it with the suplyer which confirmed the capacity of the battery, as soon it arives I will post a review of it, which maid take a few days cause I want to test how many times I can charge my phone with both a 2000mAh and the original 900mAh battery.
Dear Willem ,
Thank you for your reply.
Item 19086 was shipped on 12/31/2008 after checking. The supplier informed that it is 12000mAh, we will keep the ticket open, please feel free to send the news once you got it?
Thanks a lot.
________________________________________
Received the battery
Received today the battery but the Mini USB doesn't fit at my Diamond the output is 5V 700mA anyone now or this is enough to use and charge my Diamond at the same time cause if this is possible I will try to make a custom cable.
Someone can tell me aswell which contacts are used to charge a phone on mini USB, as you can see it seems the contacts are about the same there is just a diference at the outside off the connector, the main outside connector is a standard plug but I don't now or there are connectors at the market to make from the standard connection a mini USB
The connector fits at my dock and is able to charge my phone so in case of emergency I can charge the extra battery that way
Here some pictures
http://84.104.255.96/connector/index.html
Well I tested the battery and the outcome is disapointing, could charge my 2000mAh battery once complete so I gues all the critics about it where right, I have contacted Deal Extreem but untill now no answer.
Willem
Just Mobile 4400 mAh Charger: http://www.expansys-usa.com/d.aspx?i=166301
PPC Tech's 5 Pin Adaptor: http://www.expansys-usa.com/d.aspx?i=145975
Found another: http://www.tang-shop.com/universal-external-battery-powerbox.html DO NOT TRUST THIS SITE!!!
I want to buy a portable charger, anyone have any experience on this brand?
Can you recommend what you are using? Can it charge fast? I read some chargers can't charge fast.
I'm having real problems with portable chargers for the X7510
I have a U2O 13200 mAh charger for my Advent netbook, which also has a USB output for mobile devices at 5V/ 1000mA, but unless the X7510 is on standby, or in screenoff mode, it won't charge fully and takes an age. Likewise for my Maplin minicharger, though that's no real surprise.
The only reliable way to charge mine without the wall charger, is to plug it into my Brodit active holder in the car! For some reason the X7510 seems to draw more current than USB can supply when turned on- not something I noticed with the X7500.
NeilM said:
I'm having real problems with portable chargers for the X7510
I have a U2O 13200 mAh charger for my Advent netbook,
Click to expand...
Click to collapse
This looks nice. Sad that it does not work well with the X7510.
Does it maintain the battery level if you have your X7510 turned on while charging?
NeilM said:
I'm having real problems with portable chargers for the X7510
I have a U2O 13200 mAh charger for my Advent netbook, which also has a USB output for mobile devices at 5V/ 1000mA, but unless the X7510 is on standby, or in screenoff mode, it won't charge fully and takes an age. Likewise for my Maplin minicharger, though that's no real surprise.
The only reliable way to charge mine without the wall charger, is to plug it into my Brodit active holder in the car! For some reason the X7510 seems to draw more current than USB can supply when turned on- not something I noticed with the X7500.
Click to expand...
Click to collapse
I wonder if the USB adapter on this link (post #7) can fix your charging problem: http://forum.xda-developers.com/showthread.php?t=387531&highlight=usb+chargers
or how about using the original active sync chord to charge?
I might go for this charger: http://www.tang-shop.com/universal-external-battery-powerbox.html
Then I will also buy the PPC Tech's 5 pin Adaptor: http://www.expansys-usa.com/d.aspx?i=145975
Thanks for that info- may try the adapter. I'd just seen a similar post on Modaco about the Omnia and Diamond CDMA phones and the fast charge/trickle charge problems. 1st I'd heard about the differing pinouts!
I've tried all the different USB cables- the X7510 is only supplied with a standard USB cable (at least mine was) though my Diamond has the enhanced one. Neither makes any difference. My problem is not really that it won't charge from the power pack, but that if left turned on, the power pack stops charging after a time and I have to press the charge button again to restart it.
USB via the PC just about manages to trickle charge it, unless its set to Disk Drive mode, in which case it is faster; screenoff/standby is faster still.
Keep us updated!
NeilM said:
Keep us updated!
Click to expand...
Click to collapse
Yes, I'll post my update and review. I'll be ordering them today. Hopefully this will work
Hi all, I travel a lot by train and I am always using my flint to watch videos etc.
I have two Emergency chargers and I manage to use both of them happily,
A couple of things i will note down are,
They both power the device and I cant get a decent charge out of either of them but the flint will drain the external battery first. e.g. If I am watching a video I plug in either of the batteries and the flint will deplete those before it starts using its internal battery.
I have noticed a decreased charging time (Faster Charge) when the phone is in storage drive mode. I have no idea how this would help its just something I have observed while using the chargers.
On the odd occasion the flint will attempt to Sync to the batteries!? Again this is complete madness, the only explanation I can think of is the phone assumes its plugged into my PC.
The chargers i use are,
Emergency Charger
I like this one because it takes standard AA batteries which are available everywhere. It provides about 1 hour to 1 hour 30 minuets of constant power on a Standard Duracell AA.
FreeLoader Solar Charger
This one i bought ages ago the solar panels are not up to scratch so i charge it via USB. It provides 1 hour of constant power.
Hope this helps you out; let me know if you need any other info.
Regards
Atomiser
Now I'm interested in this, too. I'm planning on doing a cycle ride from John O'Groats (Nothern tip of the UK) to Land's End (Southern tip) - commonly referred to as a JOGLE.
During my JOGLE I will be using GPSed (www.gpsed.com) to track my progress. This means I'll be using the data connection to upload every five minutes or so, as well as constantly using GPS to log the route.
Needless to say I don't quite expect my battery to last the 6 to 8 hours of cycling I'll be doing every day, so I need to look into some other methods of charging my x7510.
Also, cycling in the UK means that solar chargers are more often than not somewhat less useful than what they'd be in sunny climates, like Turkey.
Atomiser09 said:
Hope this helps you out; let me know if you need any other info.
Regards
Atomiser
Click to expand...
Click to collapse
The information is definitely useful. Thanks.
NanoRuler said:
Needless to say I don't quite expect my battery to last the 6 to 8 hours of cycling I'll be doing every day, so I need to look into some other methods of charging my x7510.
Click to expand...
Click to collapse
I believe NeilM's suggestion of U2O 13,200 mAh battery charger is an excellent option for your need.
When I get my charger, I will try and charge without the PPC Tech Adapter and see if it will fast charge or not. If it won't, I will then use the Adapter and see if it works.
Nanoruler- you have a PM
Don't trust tang-shop.com
DON'T TRUST TANGSHOP.COM
I tried contacting them after placing my order and no response. I already allerted my credit card provider and I will report them to the BBB.
Off to look for another charger.
cktlcmd said:
When I get my charger, I will try and charge without the PPC Tech Adapter and see if it will fast charge or not. If it won't, I will then use the Adapter and see if it works.
Click to expand...
Click to collapse
I decided to skip this proceedure and use the PPC Tech 5 pin adaptor with the 4400 mAh from Just Mobile. I will then ran a movie in continous loop and see how long it will take for the charger to be depleted.
UPDATE:
I ran a movie in loops with BT headset stereo ON for sound. My X7510 was fully charged with green indicator lights and so is the battery charger. The Just Mobile 4400 mAh Charger lasted 5 hours until my X7510 had to rely on its own battery power.
I also connected the PPC 5 pin USB. Basically my X7510 used up the power of the charger first, as I can see the green indicator light on my X7510 for the full 5 hours.
I would definitely recommend this charger to anyone. It is small, about the size of 2 AA batteries stacked side by side. It is well made and the finish feels like it is coated with rubber to give you a none smudge surface probably to avoid sliding off the table. I give it 10/10.
Excellent news!
Do you think the PPCTechs cable makes a difference? Not got around to trying one yet!
NeilM said:
Excellent news!
Do you think the PPCTechs cable makes a difference? Not got around to trying one yet!
Click to expand...
Click to collapse
OK, I'll test it too just for you. I will only use the cable provided by the Just Mobile Charger 4400 mAh, since in my first test I already made use of PPC Tech's 5 pin adaptor. I just finished charging my X7510 from the wall outlet so it has its green indicator light on. I am now waiting for the green indicator light to turn back on after attaching the charger so I can start the test again. Will update you guys with the result.
Update:
10 minutes passed and I don't see the green indicator light. I have my X7510 setup so that if it is charging the screen is turned on with full brightness. It makes me think the 5 pin adaptor does make a difference.
30 minutes passed.... all I saw was the orange indicator light (my device is charging). I think it is safe to assume the PPC Tech's 5 pin adaptor DOES WORK. The charger can't keep up with the demand of my device, with just the screen turned on with full brightness.
I will now attach the 5 pin adaptor and wait....it took 15 min for the green indicator light to show.
CONCLUSION: The PPC Tech's 5 pin adaptor does work for fast charging the X7510.
Thats great! <getting credit card out and calling Expansys!>
For reasons unimportant here, I only have an HTC Diamond charger. When I use that with the X7510, it keeps turning the power on (ie it won't charge in standby), so this may be related to the USB config. I'll try the PPC Techs version!
NeilM said:
it keeps turning the power on (ie it won't charge in standby)
Click to expand...
Click to collapse
Are you sure you programmed your device to shut off when charging?
Because on mine, I have it setup so that the screen is always on and in full brightness when charging or syncing via cable.
cktlcmd said:
Are you sure you programmed your device to shut off when charging?
Because on mine, I have it setup so that the screen is always on and in full brightness when charging or syncing via cable.
Click to expand...
Click to collapse
I need to recheck the config!
Fast-charge adapter
cktlcmd said:
Just Mobile 4400 mAh Charger: http://www.expansys-usa.com/d.aspx?i=166301
PPC Tech's 5 Pin Adaptor: http://www.expansys-usa.com/d.aspx?i=145975
Found another: http://www.tang-shop.com/universal-external-battery-powerbox.html DO NOT TRUST THIS SITE!!!
I want to buy a portable charger, anyone have any experience on this brand?
Can you recommend what you are using? Can it charge fast? I read some chargers can't charge fast.
Click to expand...
Click to collapse
I have experience with a device RELATED to that 5-pin adaptor. It is called "HTC Advantage Lil Sync DUO Pro HandsFree & Charging Adapter" (http://www.ppctechs.com/HTC-Advanta...c-DUO-Pro-HandsFree-Charging-Adapter_1008.htm). I have used these for years with HTC Advantage x7501s. I would have to say they are ALMOST correct when they say:
"In some cases, your HTC Advantage will not charge from an AC/DC adapter or other charging accessory when the battery life is below 30 percent. Our Lil Sync® Duo Pro Adapter will charge your device from a completely drained battery."
I've never had it get that bad, but it can be very slow to charge once it gets below 20%. And using a high-current adapter doesn't help. (A high-voltage one might charge faster. Use at your own risk.) Using the Adapter_1008 with the switch set to F will often get it charging even from a computer's USB port. But not always.
I've only had an Athena 1.5 (Ameo 16GB from T-Mobile UK) for a day, so I have limited info. It does acknowledge it is charging with the switch in either the S or F position, so it is a fair guess that it uses the same pinouts for charging. YMMV.
I have found that the HTC x7501s are just plain weird about recognizing headphones, with or without the adapter. I have built various hypotheses about it, and the machines have disproven every one.
Dear XDA, i really need your help,
I am planning to make this (see thubnail)
i want to make a custom case for my htc one s. (I know it will be a little bigger but that's ok)
I want to charge my phone using a usb cable or a micro usb cable, and at the same time doing OTG. I don't know what resistor i will use yet (tips?)
Also add an extra battery. It is an old phone battery. So if i want to charge from the battery i need to stop the solar cell and guide the electricity through the 5v regulator to charge. What ya think?
I am new to modding so please comment cause i need a lot of help to make this one succeed!
Greetings, pro-one1000
sent from htc one s ville
Don't mean to be negative but I see a couple issues right of the bat. First, where are you going to get a 5 volt charger? I would guess most dc chargers are going to be 12, 24, or 36 volts. I don't think they'll run on significantly less. The solar panel is only going to output about one half of one watt. Assuming no friction loss or inefficiencies that would hardly slow your phone's discharge.
If you want to power the phone and hub I would suggest a small sealed lead acid battery. They're available in 12 volts in many sizes. Easily enough power to keep phone totally charged. Will work with cigarette lighter car chargers so you won't need to customize that part. Depending on the size it'll last a week to a month non-stop. Unfortunately, it probably won't fit in your pocket but if you carry a book bag or briefcase you could hide it there... I use a battery like this at work when I'm using a lot of phone battery and moving around too much to plug in.
Good luck with which ever route you choose!
Sent from my HTC One S using xda app-developers app
thanks
lampel said:
Don't mean to be negative but I see a couple issues right of the bat. First, where are you going to get a 5 volt charger? I would guess most dc chargers are going to be 12, 24, or 36 volts. I don't think they'll run on significantly less. The solar panel is only going to output about one half of one watt. Assuming no friction loss or inefficiencies that would hardly slow your phone's discharge.
If you want to power the phone and hub I would suggest a small sealed lead acid battery. They're available in 12 volts in many sizes. Easily enough power to keep phone totally charged. Will work with cigarette lighter car chargers so you won't need to customize that part. Depending on the size it'll last a week to a month non-stop. Unfortunately, it probably won't fit in your pocket but if you carry a book bag or briefcase you could hide it there... I use a battery like this at work when I'm using a lot of phone battery and moving around too much to plug in.
Good luck with which ever route you choose!
Sent from my HTC One S using xda app-developers app
Click to expand...
Click to collapse
Thanks for your reply!
First about the charger, i will use my 5v 1amp charger (micro usb) or an usb male to male usb cable from my pc to charge. So i'll be able to get a charger.
You're i think right about the solar panel, i need to find a better one indeed, trying to get one cheap on ebay! If i try to search for a "smal sealed lead acid battery" i get 40 dollar + big cases of batteries, could you please give a example in the form of an ebay-link?
Anyway thanks a lot and when i have ordered the parts i will try to upload the stuff!
Greetings
I'm assuming the 5v charger you're talking about it a car charger; which means it would have an input voltage of 12 - 14 and won't run on 3.7 (and even if it could run on the lower voltage the amperage would go up dramatically draining the usable power in the battery in minutes. And I wouldn't connect anything to a USB port for two reasons: first, if you connect two batteries in parallel (red to red and black to black) and they're not identical one will usually drain the other as they try and equalize (unless you isolate them from each other). Second, I don't think most USB ports (USB 3.0 i believe has provisions to receive power) are designed to receive power on a computer and your schematic doesn't include anything to prevent back feeding power to the computer.
There are many solar chargers I've seen that would give you the output you need - I've seen them designed to trickle charge RVs, boats, cars, and motorcycles - but I think they would be way to larger for what your looking for.
And I guess I should clarify what I meant by small... Was a bad choice of words for a cell phone forum, I guess. I meant small relative to other lead acid batteries; i.e. car or boat batteries. This is similiar to what I use:
http://www.ebay.com/itm/12VOLT-5AMP...US_Rechargeable_Batteries&hash=item589ef11aed
Attached is a pic of my batteries and the adapter that gives me a cigarette lighter type receptacle. And I use a spare motorcycle float charger to keep them charged. And because they're 12 volt batteries they'll power and accessory that is designed to run in a car.
I guess I should probably have asked what is your ultimate goal? And do you carry anything where you could stash the battery?
giesse1996 said:
Thanks for your reply!
First about the charger, i will use my 5v 1amp charger (micro usb) or an usb male to male usb cable from my pc to charge. So i'll be able to get a charger.
You're i think right about the solar panel, i need to find a better one indeed, trying to get one cheap on ebay! If i try to search for a "smal sealed lead acid battery" i get 40 dollar + big cases of batteries, could you please give a example in the form of an ebay-link?
Anyway thanks a lot and when i have ordered the parts i will try to upload the stuff!
Greetings
Click to expand...
Click to collapse
Thanks for your reply,
After thinking I want to use a second1-5 volt boost regulator attached a small high capicity battery of 3.7 volt. (like a galaxy sIII battery or something. So if i put the switch to on the extra battery should charge with 5v my phone battery. Or i could charge my phone directly from a high efficient solar cell with 5v.
I indeed have no idea how to prevent backfleeding. Do I need diodes / light emmitting diodes for this? And indeed the batteries you mentioned are way to big. I am planning to use an old battery from an other phone with the 5v boost regulator mentioned above. Further i don't understand where you see a computer in my scheme?
Your mod ( i think i it deserves that wonderfull name) with the 12v battery is a good idea. Very handy when going out without a charge point. I usually go to school and am probably able to put the large battery in there, but as i mentioned i want to keep it a "phone case".
My ultimate goal is to make the tiniest possible case for the htc one s ville with,
- a very small usb hub 4 port for 3 female ports and inside a micro sdhc memory for more storage.
- Add the charge ability, so i don't need to take the phone out of the case to charge
- be in otg mode and charging mode at the same time (i guess the hardest challenge)
optionary:
- Add a battery so when i get the actual phone out of the case the solar cell can keep providing power to the battery
- Add a solar cell
- make it actual work with multiple switches
Really appreciate your help!
Greetings,
I misunderstood "First about the charger, i will use my 5v 1amp charger (micro usb) or an usb male to male usb cable from my pc to charge" to mean you might have a computer available to charge. I guess you just meant the cable itself. Understood.
I'm not an electronics expert by any means but yes I believe diodes will prevent the current from flowing in an undesirable direction but they won't prevent one battery from draining another. Two batteries connected in parallel can drain each other and the diode will slow that but I don't think it will eliminate it. Might be able to mitigate the affect by opening one of your switches when the auxiliary battery is not in use. When two batteries are wired in parallel they are frequently connected to an isolator that has three terminals (for a two battery setup). Terminals one and two go to batteries one and two and terminal three goes to the system it's connected to. Batteries one and two never 'see' each other and therefore cannot affect or drain each other.
Not sure I have anything else that can really help... GOOD LUCK! And post pics and details if you build a working prototype.
Thanks again!
I'll try to order a couple extra diodes with low consuption, that plus the switches will hopefully do the job. I ordered yesterday the parts out of China, so it'll take a month to get it in my hands. Now I have more time to consider how it can be assembled all together, but if i get anything i will post it directly!! If it works i may try to make a tutorial for other people so they could also enjoy more ports on their phone!
Greetings