There's a shape that has a battery triangle on top of the cell phone.
I thought it was an indication that the battery was running out, but the battery is over 90%.
What is this mark?
5540 2017-04-06 Gentleman
It happens when you turn on sleep mode.
If you don't want to, if you lower the top of your phone, there's a power saving button, and you can turn it off.
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