[Q] extending battery for plane travel?? - Eee Pad Transformer Q&A, Help & Troubleshooting

I am looking for every bit of advice I can get to eek out every last bit of juice from my battery for a transatlantic flight. I will of course be in airplane mode and will only be running my reading app and playing music. What settings would you recommend? I am rooted, but not rommed.
I also wonder if those portable battery packs are worth anything. My research tells me that I would need a 15 volt output to charge. But will those with only a 5 v output do anything to help but me extra battery time at all?

low brightness and underclock. that should give you at least 10 hours with just the tablet about 20 if you have the dock too

Yeah if you have the dock as well it'll definitely last the whole way. Brightness is the biggest thing, just keep it low.

Thanks for the advice. Thoughts on underclock settings? Anything gained by switching kernels? I am running the stock kernel right now. I do not have a dock and do not want to drop the big bucks on one or a larger 15 v output battery backup. I was hoping that one of the 30 buck deals might buy me a few extra hours.

Yes, definitely switch to ARHD or Guevor's kernel, noticeable battery increase. Make sure you keep it in airplane mode P) the whole time. I'd set underclock to min lowest freq, max around.. 500-700ish (Normal is 1000, so 50-70% of normal clock) and importantly, set the Governor to 'conservative'

i fink the easiest way is too deatived app like antivirus,low brightness and clean each time you are on the home screen you memory with the asus taskmanager

Alan1995 said:
i fink the easiest way is too deatived app like antivirus,low brightness and clean each time you are on the home screen you memory with the asus taskmanager
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why are you using an antivirus? you dont need one for android. And clearing ram is not always a good thing as long as the apps are tombstoned not running in the background

Related

Looking for proven and tested higher capacity battery for HTC Desire

As above, anyone using higher capacity battery for their HTC Desire and it is tested and proven to last longer than the original batter? Can post the link to purchase the battery?
Thanks!
Before you buy another battery, have you read this thread about calibrating your battery?
And have you installed a rom that allows underclocking? It makes a massive difference.
I am now getting 20+ hours from my phone where as before underclocking I was getting 8 hours.
Same amount of usage, just underclocking when screen is off.
Erm.. I will go read about it, but because I want to retain as it is now, thats why I'm looking for an extended battery.
Sent from my Milestone using XDA App
bryant_16 said:
Erm.. I will go read about it, but because I want to retain as it is now, thats why I'm looking for an extended battery.
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What kind of battery life do you currently get? Before (accidentally) calibrating my battery I was getting around 10-12 hours, now I'm getting around 36-42 hours.
I'm looking for one that can last me more than 1 day.
Lennyuk said:
And have you installed a rom that allows underclocking? It makes a massive difference.
I am now getting 20+ hours from my phone where as before underclocking I was getting 8 hours.
Same amount of usage, just underclocking when screen is off.
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Hey buddy, which app do you use for underclocking? Cheers,
bryant_16 said:
I'm looking for one that can last me more than 1 day.
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Well, I'm using the standard battery and have 26% remaining with "1d 10h" since unplugged (admittedly I haven't used the phone for that much in that time, just some internet usage, a couple of calls, but it's been constantly on WiFi or 3G to sync GMail).
Use SetCPU for underclocking, and use JuiceDefender to automatically turn off your data connection while the screen's off/locked.
It will still reconnect every 15 minutes to sync, and will remain connected as long as there's any continuing 3G traffic while the screen's off. Basically what it means is you're running one of the most power-consuming parts of your device only 1/15th of the time, which make a big difference. Text messages and voice calls come through instantly still - only things requiring a data connection like facebook, weather, twitter, etc will have any delay, and even then it'll only be 15 minutes at the most.
You can also try setting your phone to WCDMA-only, which means it won't be constantly trying to connect and maintain two radios simultaneously. GSM-only would be even better but depending on your carrier it might not work at all or might only work for voice.
With SetCPU try making a profile to automatically go into "powersave" mode when the screen's off, which will ensure the CPU never clocks up past its minimum speed during that time. It's still over 200 mhz, more than enough for anything you might want to do in the background. For normal operation, between 499 and 768 mhz as the maximum clock, depending on your preference, should be adequate and will save you a little bit of battery life as well all the time.
Also, download a widget to allow you to manually set screen brightness when you're indoors and the auto setting is useless. I have my screen brightness set to 15% while indoors and it's still plenty bright. I have the SLCD model, I don't know if that makes any difference.
My phone has been off the charger for 17 hours and 10 minutes. During that time, the screen was on for 2 hours and 29 minutes. I'm at 79% battery life with the standard battery.
Mugen 3200mah. Mine lasts a day with ease and heavy use.
paprkut said:
Mugen 3200mah. Mine lasts a day with ease and heavy use.
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Yours able to charge it properly?
A small update to my previous post... I'm now at 32 hours, 38 minutes uptime, 4 hours 44 minutes awake time (screen on). Battery just reached 60 percent. Stock battery.
Remember when you made the choice to buy an Android, you were in effect saying you wanted to have a highly customizable miniature computer. Just like when you customize [insert your desktop OS of choice] to suit your taste, you need to configure your phone in order to get what you want out of it - namely, better battery life than with the standard settings.
HTC's goal with the Desire was to have a showpiece, it runs very fast and it looks good doing it. But they designed it with frequent charging in mind. Since most of us here, I imagine, would prefer to charge less often, we just need to configure the phone appropriately.
If you want a guaranteed solution, try this:
- Install NextSense rom (it's free, latest version right now is 5.3 AFAIK, I'm currently using 5.2 still)
- Install JuiceDefender - it's free on the market and its default settings are, for a change, very intelligent and effective.
- Install SetCPU - You can get it free on this forum. Set it to "interactive" mode with a bottom speed of 245 and a top speed of 806 to start with. The default is 998 at the top, but 200 mhz doesn't make a big difference in this case except to help battery life a bit. Once installed, add a profile for "screen off" which sets the phone to "powersave" mode. This will keep it running at the minimum clock any time you're not using it. Nothing running in the background while you're not even using the phone requires more than the minimum CPU speed.
- Install the Brightness Widget by Curvefish. It's free on the market. Put its widget on your desktop and keep your screen brightness at 25% while you're indoors. 15% is what I use, but 25% is one of the presets so it's a bit easier. I have an SLCD display so the brightness I get on auto might just be different from what OLED gets on auto, I don't know, but in any case for me it's way brighter than it needs to be.
- Set your screen timeout to no more than 2 minutes
- Make sure any apps that sync data do so in a reasonable interval. +/- 15 minutes won't ruin your day for most things.
- Under Wireless & Networks, set your phone's connection to WCDMA-only (3G-only). For many people this results in an increase to both signal quality and battery life, since it allows your phone to only run one radio at a time, making a significant difference. If it doesn't work for you, it's as simple as turning it back to the default setting.
- Disable haptic feedback and see if you mind the difference. Making all those little vibrations takes power too.
- Finally (obviously) don't run a live background, but you probably already know that.
Doing all of the above takes an hour or maybe two at most to set up and the difference in battery life is tremendous. It's simple to do, I worked out all of the above on my own and I've literally only had the phone for 4 days now I think, never touched a smartphone before in my life let alone an Android.
Give it a try, you have nothing to lose, and it will probably save you needing to buy a battery. Or, if you still buy a double-capacity battery, it'll mean you can run for like a week on a charge.
edit: also make sure to get the latest version of the radio driver, I don't have a frame of reference for comparison since I updated mine right away, but apparently it makes a fair bit of difference and probably gives you a more reliable cell signal in the process.
In case you think I'm exaggerating, here are some pics I just took.
What's the ideal settings for juice defender? Cos my phone is not rooted so I'm not going to use the SetCPU application.
What do you mean charge properly ??
Is it able to charge?
bryant_16 said:
What's the ideal settings for juice defender? Cos my phone is not rooted so I'm not going to use the SetCPU application.
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"Ideal" settings are basically the way it's configured by default. You can't improve upon them much even by getting the "premium" upgrade unless your phone is rooted... but SetCPU is a better choice in that case anyway.
Just install it, hit "enable" after it's done auto-detecting your phone's capabilities, and you're done. It's really that simple.
Be sure to add it to your task killer exclusion list if you use one.
You saying the default option is for SetCPU or Juicedefender?
So just download the free juicedefender is good enough for me already since the pro version is more for rooted phones? (mine is not rooted)
Can somebody pls. post the link to SetCPU?
cyron_at said:
Can somebody pls. post the link to SetCPU?
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http://forum.xda-developers.com/showthread.php?t=505419
bryant_16 said:
So just download the free juicedefender is good enough for me already since the pro version is more for rooted phones? (mine is not rooted)
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Yes exactly. The pro version unlocks some more customization but ultimately won't add a whole lot to your battery life no matter how it's set up. I mean, beyond what the "regular" version does.

HELP! Where did I go wrong?

So I just got a brand new D2G and thanks to the info in this forum I rooted it and installed fission rom and FRM...Im loving the phone, its fast, smooth and beautiful but the battery is AWFUL. I have read all the info about how to get the most out of your battery and everything on these forums but mine is waaaay worse than anyone has said before.
For instance, last night my phone was charging oernight, at 6 am when i woke up to pee it was at 100% so I unplugged it and went back to sleep, come 10 am when i woke up my phone was down to 15%!!! From just sitting there with the screen off...
Ive set the network to CDMA/Evduo automatic, installed Jrummy's overclock app...Can anyone explain in detail what exactly the settings in the overclock app mean? "set scaling frequencies at boot, cpu scaling frequencies etc?" for instance if I set scaling frequencies not at boot to ultra low voltage and 1 ghz and lower, do i need to also go into cpu scaling frequencies and make profiles and stuff?
Any information is greatly appreciated, Ive been reading up for days but this stuff is hard to find clear answers on specific issues. Thanks!
This is probably the most basic first thing to ask/do, but have you checked the battery useage to see which apps are using the most power? try doing what you did where you charged, and then let it sit for 4 hrs, and after that see what's using the battery, I bet there is some app that just nonstop uses the gps or 3g data or something wearing your battery life out super fast.
Yeah i looked at that this morning to see and all it said was suspend took up like 90% of the battery...Doesnt make any sense
1. Set at boot isn't what you're thinking. Set at boot means that whatever your current settings are will be set the NEXT time the phone boots. This is used when you have a setting you like. The reason you DON'T want to set at boot is that if you accidentally pick a setting that your phone doesn't like, and it makes it crash, then next time it will boot up with normal settings. Otherwise, you'd be looking at some work doing a recovery with either CWR or RSDLite... There are better ways to spend 30 minutes. Disclaimer: I use SetCPU, but the settings are all essentially the same.
2. For scaling, unless you're a power user (read: Geek) who's really up on his stuff, you should just stick with ondemand. This means your CPU will run at the lowest frequency possible, but will scale its speed up when processes call for it. This is efficient.
3. Yes, you should still make profiles. The setting on the main screen where you choose "Set at Boot" (Again, I'm speaking from SetCPU experience, but it SHOULD be the same) is just the main profile, setting the global minimum and maximum. You should leave the minimum on this at 300. The phones don't like to run much lower than that, even with the screen off; They start not ringing for calls, not waking up, etc. Set the maximum to whatever you want the max to be. You can overclock, which will obviously hurt your battery life. You could underclock and set the maximum to 1GHz, or even 800MHz, which would have a decent effect on battery life with no noticeable performance decrease to the average user. I run mine at the stock 1.2GHz and it's fast enough for my needs.
4. I wrote this thread to help people maximize their battery life. It's pretty detailed, you should give it a thorough read, it works well for me, and seems to work for others. I'm at 32hrs unplugged and my battery has gone from 90% to 20%. That's pretty light use, and I have an extended battery, but I still see over a day on my stock battery when I use it. There's a list of my SetCPU profiles there too, that might be helpful in setting up your own.
Thanks for the info on overclocking, I think I have it figured out now...
I will definitely read through your thread, but is it possible that I just had a bad battery? due to a shipping error, when verizon sent me my phone they sent 2 by accident so I just swapped out the battery for the other one and it seems to be doing much better already...

What apps are you using? Juice Defender? Set CPU?

I am coming over from the sd version of android on my HD2. I had to download all sorts of stuff to get it working correctly. I already found Set CPU does not work correctly. Has anyone tried SD Card Increase or Juice Defender. Are these things needed?
I read the speed up apps thread but was wondering about these apps in particular.
Is there a way to regulate the CPU to save battery?
Edit:The latest version of SetCPU seems to work fine. I think I had an old version.
I am also using Antek App Manager to freeze battery hogs like wifi calling.
Where's my Droid Power is another helpful app to isolate what is killing the battery.
Anyone try a screen off profile with setcpu yet?
Sent from my G2x
Setcpu wont work until kernel allows it.
G2X
SetCPU works at the driver lvl. The Nvidia tegra 2 option is there to pick when you 1st load the app. You can set profiles as well. you just can not control the scaling yet. You can control how the cpu runs
Running SetCPU and it works fine for setting profiles and helping to give ya a bit better battery life.
I'm also using juice defender and power manager. With them and my profiles set up similar to what I had on my Nexus One I am getting really good battery life.
I got over 24hrs (closer to 36 actually) on my last charge, but my usage wasnt too heavy, but close to average for me.
I've got a profile set-up for "screen off" through SetCPU along with using Juice Defender running all the time. I also used Bloat Freeze to stop the random stuff from even starting to cause drain.
cbsummers said:
Running SetCPU and it works fine for setting profiles and helping to give ya a bit better battery life.
I'm also using juice defender and power manager. With them and my profiles set up similar to what I had on my Nexus One I am getting really good battery life.
I got over 24hrs (closer to 36 actually) on my last charge, but my usage wasnt too heavy, but close to average for me.
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I was curious about what kind of profiles/set up you had for these 3 applications: Setcpu + juice defender + power manager. Perhaps you can prepare a guide for us. It would be greatly appreciated =)
My device gets me 10 hours, I am very interested on how you are getting 24+ hours.
slickerxcuh said:
My device gets me 10 hours, I am very interested on how you are getting 24+ hours.
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Last cycle I did, I got 25 hours on a single charge. This is exactly what I'm doing. First, root. Next, set up sync so that it only syncs apps when you are using them, as there is a problem with the 4g handoff to Wi-fi that seriously messes with battery life. Set Wi-fi sleep policy to never, so 4g doesn't interfere with it. Set device to use 2g network only, you might get better reception. If you need a fast connection, just enable it real quick. There are widgets you can use to switch it back and forth quickly. When rooted, use root explorer or bloat freezer to get rid of/freeze ALL T-mobile apps. These things always use data, even when Wi-Fi is available. Since they start on their own, you will always have 4g on, sucking your battery dry (and your wallet if you don't have unlimited data). I've also heard updating the apps works, if you are planning on keeping stock ROM. Keep brightness to its lowest setting unless you need it higher for whatever reason. This setup might seem extreme, but i've been on the internet since 6 am, playing need for speed shift, watching youtube, listening to music and I'm at 65%.
Factory reset and do the google setup immediately. For whatever reason, this is important. Let the battery run dry for the first week or so, and then charge it all night.
Above all, remember that the battery stats on this device are ALL CRAP.
http://forum.xda-developers.com/showpost.php?p=13182735
Read this post, beautifully explained.
Good luck!
Though far less sophisticated, I like Superpower the best. It very simply and efficiently disables data/wifi when the screen is off, which is all I need.
Thank you for taking the time to write that up. Definitely will give this a shot soon enough.
slickerxcuh said:
I was curious about what kind of profiles/set up you had for these 3 applications: Setcpu + juice defender + power manager. Perhaps you can prepare a guide for us. It would be greatly appreciated =)
My device gets me 10 hours, I am very interested on how you are getting 24+ hours.
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Click to collapse
Sorry for the slow reply, had a deadline beating down on me.
For the most part I just set up several profiles in set CPU and also profiles on power manager, and I just use the basic settings on juice defender.
SetCPU profiles I have are:
Screen Off 760max/216min
Battery<25% 816/456
Battery<15% 608/312
Hope that help some. Mine seems to be averaging about 18-20 hrs per charge now, but I find myself messing with it quite a bit I think once I get back to my normal usage, like my usage on my N1, it will easily make it 24hrs with a charge.
preview versions of Riptide GP, Pinball HD, and of course some Angry Birds or another - gotta catch em all!
That reminds me - why hasn't nintendo released PokeMon for any system other than their little nintendo handhelds? Seems like an untapped market.
My Thread
Well actually i just got done typing up a new thread on how i get 20+ hours on my G2x. Here is the link: http://forum.xda-developers.com/showthread.php?p=13279194
Cant get setcpu to work. Force closes on me. What did you guys do?
Sent from my LG-P999 using XDA Premium App

[How-To]Getting Better Battery Life

This is what I've done to help my battery life.
Firstly you'll have to root your device, then follow the steps below.
1. Install SetCPU(from Market or where ever you can find it)
2. Run it, allowing root access when asked by superuser.
3. On the Main tab, set Max and Min to 1200000(1.2Ghz), or whatever you want general usage to be. Most users probably want it like this so it will stay at best performance during using, and will not slow down. Also, whatever speed you're using set Scaling to Performance. Even if you are not running at top speed, it is still good to use Performance for the settings you want while using the device.
4. Go to Profiles tab. and check Enable, and click Add Profile. Set it to Screen Off, and you can change the settings to whatever you want. I had it at 100000(.1Ghz) for Min and Max, but when you go to unlock your screen, it lags a lot for a second. I currently have Max and Min set to 400000(.4GHz), and it made it so it does not lag when I go to unlock, but it is still low enough to be very conservative on battery. Set Scaling to Powersave, and Priority does not matter unless you have more than one profile, so don't worry about it.
5. (Optional) Install JuicePlotter from the Market, for free, and it has a nice widget that collects your phone data and after a few days will become very accurate on phone battery life remaining. It will show it after a day or so, but it will tell you how accurate it is, and it might not be very high until a few days later.
And that's it. Whenever your screen is off, it will underclock the processor so it's not using as much battery when not necessary. If you want, you can add other profiles, such as for when charging, and when the battery is low. I originally had it set to 1.2 GHz Max and Min while charging, and set the priority higher than the Screen Off, so it didn't clock down if I turned the screen off while charging, but there is no reason, I'm still not using it when I turn off the screen, so I deleted that profile.
So if your only profile is the Screen Off, then once you turn the screen on, it will change to whatever settings you have on the Main tab.
I unplugged my phone at 6:30 AM, and it is now 5:30 PM here, and I still have 32% battery, with JuicePlotter telling me I have 4 hours and 49 min left, but it only has a 72% accuracy since I just got the app yesterday. That's great since yesterday my phone would have been dead over 2 hours ago. When I woke up JuicePlotter said I had around 15 hours, but it wasn't as accurate as it is now, and it so far is expected to last longer than that..
I just use JuiceDefender free set to Agressive to obtain the best battery life. I got this little vendetta against SetCPU though.
I saw a button on there that said battery saver, what exactly does it do?
apwhitelaw said:
I saw a button on there that said battery saver, what exactly does it do?
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Not sure. I'm learning JD myself here so .... yeah
apwhitelaw said:
I saw a button on there that said battery saver, what exactly does it do?
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Click to collapse
It takes you to a recommended battery saving app from the market. I haven't tried that app, but I imagine it is probably something similar to SetCPU.
I think this is wholly unnecessary, I'm sure samsung underclocks when not in use already, it's an obvious thing to do. I haven't done any of this and I can get ~40 hours of light-medium use
But try watching justin.tv streaming movie on hspa+ lets see if you even get 4hrs?
Sent from my SAMSUNG-SGH-I997 using XDA App

[Q] Underclock - usefulness AND values

I am playing a bit with underclocking my DS (Using UNITY v4 kernel atm, will update to v9 later).
However, I'm figuring out the usefulness of it (to extend battery life mainly).
Does it really save battery life? I'm already using JuiceDefender, and its SetCPU function.
Or is it not very useful since the most batterydrain comes from radios anyway.
What are the best values for it?
What's the standard clockspeed for the DS? And what is the best Max IDLE clock speed?
Well, i wont underclock at all.
First of all there is no need to do that to get good battery life. You can do lot other stuff to do so.
Under-clocking is risky as it might now have enough power that needed to the phone. that means that some stuff might not get processed like calls and stuff.
Right now with me using miui i get life for about 3-4 days.
Standard clock speed is 1,000mhz.
I have mine underclocked to 600mhz during idle times and it's perfectly fine.
Never had any issues at that speed and it keeps my Desire S much much cooler which can only be a good thing.
As for it's ability to extend the battery, I don't think it does so much in my case. I typically run WiFi overnight and G/3G/H during the day and my display usually chews up 60-70% of my overall battery usage even on a very dark screen.
I'd pick a setting that you feel comfortable with but have low expectations of the benefits.
The only time I use underclocking is for using Google Navigation.
On a hot day using Navigation for over a couple of hours, my DS would over-heat and restart (usually as I was approaching my motorway exit). So I have Tasker dialing back CPU to 768Mhz when using Navigation, and it does seem to help the phone run a little cooler. I no longer have to take it out the case for example.
Using the smartass governor (I believe) automatically knocks the CPU back to 240Mhz when sleeping. Not 100% on that though.
I'm currently testing a new kernel, and I spent an entire charge cycle on 'Smartass' and then an entire charge cycle on 'Powersave'. Aside from lots of lag on the latter one, the battery life was pretty much the same!

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