Originally Posted by
Sedp23 have the Lumia 640 and actually had to hard reset it last night in hopes of better battery I hadn't reset when I initially updated to .63 so I'm hoping this helps.
I had roughly 85% before I went to sleep around 11pm last night woke up in the middle of the night on 30% in battery saver mode
I've seen posts saying.63 improved their batteries noticeably so I'm hoping the hard reset I did works
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I did a hard reset on mine with fresh installation of very few apps (Whatsapp, wallpaper and ringtone apps), with no improvement of battery life. I also disabled background use of most apps, however, the phone still drains battery like crazy in standby (see my above posts).
I don't understand why some people seemingly get great battery life on the same hardware, when other people do not.