1. wetermommy's Avatar
    Still learning about this awesome phone and curious what "fast charging" really is. Assumed its what it says and charges fast. But then there's days it is def slow charging lol.

    Posted via the Android Central App
    01-20-2015 03:23 PM
  2. Rukbat's Avatar
    It charges the phone from 0% to 50% in 30 minutes, then reverts to normal charge.

    Since you should never allow the battery to drop below 40% (unless you own stock in a lithium battery company or a lithium mine), it's more of a marketing gimmick than anything else. (Also, it's a full 1C charge - it charges at 3.22A - it shortens the battery life a little. A 0.75C charge [about 2.4A for the Note 4] is a lot better for the battery.) If you want maximum battery life between new batteries, charge it on normal charge mode (not fast charg) when the battery gets down to 40%-50%. (If you need more than that between charges, buy a spare battery. (You can get 2 with a charger to charge one of them outside the phone while charging the other one inside the phone for $23.)

    If you want 6 months life, you can let the battery keep running until the phone shuts off, then use fast charge to get half a charge in half an hour.

    To address your last sentence, if it's already near 50%, you get the normal charge time to 100%. It's only that first 50% that's fast (and harmful, both because of the charge rate and because you let the battery discharge too far).
    01-20-2015 03:47 PM

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