
Originally Posted by
bruben7886
At your next chance, turn the phone off (you can turn it off at any charge level). Charge it with power off until you reach 100% (tap the volume rocker to check.....should be about 4-5 hours if the phone was at about 15%). Turn it on again and use it normally until you reach the "low battery" warning (approx 10%). Turn it off again and recharge to 100% again with power off. This will set the high and low battery flags on the meter; thus, calibrating the meter to your battery. Kinda like resetting your car's fuel gauge to accurately read the fuel level in the tank.
Do this about every 2-3 months.
Now, about the 3g/4g thing...4g is a known battery sucker. If you need 4g keep it. I rarely need to download something while away from my wifi so I have 4g off. Wifi uses less battery than 3g and is faster than 4g (at least mine is).
Turning 4g off is easy. Download lte on/off from the play store. I know it's listed for another phone....don't worry about that. Open the app and scroll down to "set preferred network type". At the right corner underneath it you will see a small gray triangle, tap it. Select LTE/CDMA/EVDO for 4g, or CDMA/autoPRL for 3g. Tap the back button until you are out of there.
It should stay on 3g even with a restart. BUT....I noticed that this is app-dependent. Some apps make it revert back to the default 4g on restart. If this is the case then reapply the switch. Sound complicated....but it's not really.
Another thing that you can do to extend battery life is to apply the 215 leak over ics. This leak is real Motorola software and perfectly safe. It's the latest "patch" for the ice cream sandwich upgrade. It extends battery life.
I'll post the link on a terrific thread that will walk you through it.
All credit for the battery meter calibration info goes to FoxKat. The 215 leak info comes from MattyP.