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The second generation HTC One—dubbed the HTC One (M8)—features a dual flash and the new Sense 6 UI, and was released March 25, 2014.

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Why do I have a exclamation mark on battery symbol,how can it be fixed

I have a htc one m8 and all of a sudden a the battery will be fine but then it changes to a grey battery with a red exclamation mark inside and I don't understand what it means or I don't know how to fix it and the phones only on 16%

Many thanks

Need to know ASAP

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If it's a new battery, be sure to check and tighten the screws that connect to the battery. Put it back together and plug it in to see if that fixes it. It fixed mine! My battery had a 50 percent charge from manufacturer when I finally got the phone to turn on.

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This means the battery is faulty or not properly communicating with the phone's logic board properly.

I would recommend replacement.

Here is a teardown guide.

HTC One M8 Battery Replacement

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Chloe Walden will be eternally grateful.
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