Battery Life Optimization Guide

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Rule 1: If you haven't taken these steps, you haven't done a thing in the way of actually optimizing your battery life, and please do not complain that your battery is bad if you haven't at least done steps 1 and 2!

Step 1: Use BetterBatteryStats: http://forum.xda-developers.com/show....php?t=1179809
This will diagnose battery drain issues. If you have apps that are sucking battery in the background, this will show it. Google the ones that have high partial wakelock, and usually you will get a diagnosis. It is also sometimes very easy to figure out what is sucking battery just by looking at the application that is holding wakelocks or having many alarm wakeups.

Step 2: Sync settings, make sure that all of them are either at push or as high as you're personally willing to allow between sync checkups. Any sync settings that happen too often will trash battery life.

Step 3: Radio based drain is a very big part of battery life! As such, if you do not need constant sync, you can turn off mobile data on your own when you do not need it, or go to the Mobile Network settings and disable always on mobile data. This can greatly increase battery life, but at the expense of sync not working when mobile data is off.

Step 4: Display brightness can greatly affect the power drain of the battery! You can either manually control the brightness, download Lux autobrightness to make your own autobrightness settings, or flash a custom autobrightness setting in the ROM in order to achieve this. It also can have the side effect of making the display of the right brightness when in the sun and in the dark, so it is always at ideal brightness to preserve battery.

Step 5: Make sure that the battery is calibrated. This is not very complicated. Download currentwidget from the market, put it on a homescreen. Charge the device until currentwidget indicates 0 mA charge. Use the phone until the phone shuts off. You might want to then go to hboot and drain the battery until it shuts off again, and then do a full charge again. Only do this once every 2-3 months, because this is bad for the battery.

Step 6: Adblocking! One big cause of battery drain and unnecessary network usage is downloading ads. If rooted, use Adaway and Adblock to block ads from ever being downloaded, and use Adaway's adware feature to detect and remove apps with adware!

Step 7: A radical step is to use Core Control or something similar to either underclock, undervolt, or just shut off cores. Undervolting is always highly suggested, as it will help reduce heat and give the phone a longer lifetime, but underclocking and shutting off cores will reduce performance!

Step 8: Custom ROMs and kernel experimentation might yield just a bit more in the way of battery life, and also give much more customization and features.


After this, you have likely topped out all that can be reasonably done to extend battery life. If you find that your battery drain is still poor, perhaps you have a defective battery, or maybe even a defective device (Highly unlikely, but who knows...). It is also possible that you simply have a use case that is much more than the phone can accomplish, in which case you can either use a battery case, or an external battery to charge the phone on the go.

Originally Posted by Hunt3r.j2

Step 5: Make sure that the battery is calibrated. This is not very complicated. Download currentwidget from the market, put it on a homescreen. Charge the device until currentwidget indicates 0 mA charge. Use the phone until the phone shuts off. You might want to then go to hboot and drain the battery until it shuts off again, and then do a full charge again. Only do this once every 2-3 months, because this is bad for the battery..

Weird, I've tried this many times, and can't get the indicator show exactly 0 mA...
the lowest for me around 3-5 mA... :|

what do you mean by undervolt because i dont understand..what are the consequences ?

Originally Posted by nemer12

what do you mean by undervolt because i dont understand..what are the consequences ?

if too much undervolting the phone freezes/ reboot ....so the best value for undervolting is between 50 and 100mv ....in some cases undervolting increases battery life and makes the phone cooler but not much ...

Under volting is when you tell the battery to provide a little less power than usual.
Which is why the battery life usually increases, as less battery is being used than previously.

But as stated, too much can cause the battery to not provide ENOUGH power, therefor crashes and cannot boot properly etc.

Originally Posted by One-X-master

if too much undervolting the phone freezes/ reboot ....so the best value for undervolting is between 50 and 100mv ....in some cases undervolting increases battery life and makes the phone cooler but not much ...

Pretty much, I would say. Drastic increase of battery in games: phone won't get hot => battery will last longer without overheating and, what is much more important, it will stay healthier in long run.
Even on wall charger while playing, my HOX won't overheat with - 100mv UV.
This is the main feature I miss on JB Sense without custom kernels

Sent from my HTC One X using xda app-developers app

THANK YOU

Originally Posted by MysteryE

Weird, I've tried this many times, and can't get the indicator show exactly 0 mA...
the lowest for me around 3-5 mA... :|

Same here. On both my old HTC Sensation, and my HOX. Never saw the mA reach 0. Even after leaving on the charger for a couple of days.

Originally Posted by DarkManHaze

Same here. On both my old HTC Sensation, and my HOX. Never saw the mA reach 0. Even after leaving on the charger for a couple of days.

The problem is, the phone cannot get the same amount of energy, it consume (in fact, it is the millisecond, where the phone is fully charged, than it discharges for some minutes, than it will be charged again for three minutes and so on periodically). So, what I mean, you will almost never see 0 ma on one X or other modern phones. You can only see that, if device can disable battery while it is fully charge and use wall charger like a main supply. And the last device with such behavior was Huawei s7 back to 2010
So, 3-5ma is pretty ok.

Sent from my HTC One X using xda app-developers app