Join Date:Joined: Nov 2013
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Actually there are a lot of things that you can do to save battery: turn off data, fall back to 2G network, turn off WiFi, Bluetooth, NFC, etc... keep lightness low... The ROM you are using also affects your battery life.
BUT anyway, G2 is really a battery saver itself alr... but i am using CarbonROM now, and the battery saver mode is great.