1. Hardcase19's Avatar
    I am having an issue ever since upgrading my Verizon HTC One M8 to Marshmallow.
    The phone will shutdown at around 20% battery remaining. It will not power back on.
    Once I plug the charger in, as I did this morning, it shows 20% battery life and will now power back on.
    This also leads to my notification settings and some app settings to be reset.
    This is driving me nuts. I have tried clearing the cache multiple times and also attempted a battery reset, although not sure it worked, by holding down the power button and volume down I believe.
    Is anyone else having these issues? Has anyone fixed it?
    My last resort is going to be a factory reset but I really want to avoid this if possible.
    thanks for reading..
    04-27-2016 09:14 AM
  2. Stykthyn's Avatar
    Mine does tthis as well. I'm told it's the battery software that tells the phone how much juice is left. There is a reset and I've done it but it doesn't work and I'm afraid that after 25 months my battery is on its way out.
    04-28-2016 02:01 PM
  3. Hardcase19's Avatar
    Is the battery reset you tried the one where you hold the power button and the down volume for 2 minutes?
    I found and tried that one also, did nothing to help.
    Also found a couple of people on other forums that are experiencing the exact same problem.
    Never had the batter issues on KitKat but started immediately after upgrading to MM.
    04-29-2016 10:59 AM
  4. Stykthyn's Avatar
    Yes. It's been happening for about 8 months.well before the marshmallow update.
    04-29-2016 12:34 PM
  5. Bleys1704's Avatar
    I am having the same issue. While the battery dying at 20% is annoying the changing settings when I turn the phone back on is worse. It is driving me insane!
    Dors anyone know why these settings are changing?
    04-30-2016 07:15 AM
  6. Rukbat's Avatar
    Lithium batteries don't last long if you deep discharge them. Anything under 40% is playing with fire. Constantly draining the battery to 20% will give you about 50% battery lifetime - or less.
    05-01-2016 03:34 AM

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