How to Disable Haptic Feedback on LG G2
Haptic Feedback is enabled when touching the front buttons (Menu, Back, and Home buttons) and it vibrates upon touching with variable strength and ...
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You want your battery to have a longer life, but you probably don't know what to do for it.
Isn't it better to consult with your android battery doctor and choose one of the suggestions it gives you?
The Battery Doctor application will do that for you. It will suggest you many modes for saving your battery (circled with blue). You can choose one of them that best suits your situation, or define a new mode for yourself (green), though it needs a little bit of experience.
You can even schedule the device to go on saving modes in specific times of the day.