How to Conserve Your Battery Life
When you are out in the backcountry for several days, it is important to conserve your battery.
Start off by changing the settings you would normally change to conserve battery, such as dimming your brightness and shutting down extraneous running applications. Check out this WikiHow entry on conserving the battery life of Android phones: http://www.wikihow.com/Save-Battery-Power-on-an-Android.
Please note: turning on Airplane Mode can really help to save battery, but we suggest that you verify your device still acquires a GPS signal when it is in Airplane Mode, as some Android phones do not.