Re: Battery going from full to half full
the phone, o/s, and battery do not agree what 100% & 0% actually are. let fully die, until the phone will stay on less than a minute. then fully charge. (preferably while off, then without unplugging boot into the o/s until it reads full as well)
also if you only ever use the top 50% then it will wear out quicker than the bottom 50 so the bottom will work better than the top.
there are times when my phone will survive a day on less than 5%. that's how I know it's time to calibrate again.
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