What's the sign that the battery triangle is on the top of the cell phone?

cellphone cell-phone smartphone mobile android

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?

5507 2017-04-06 Gentleman

A. 1

Appears when sleep mode is on.

Gentleman 8 years ago 0

A. 2

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.

Gentleman 8 years ago 0

A. 3

@1ㅅ

Lady 4 years ago 0

A. 4

@1ㅅ

Gentleman 4 years ago 0

A. 5

ㄷᆺ느ㄴ

Lady 4 years ago 0

A. 6

Gderson

Lady 4 years ago 0

A. 7

(sighs)

Gentleman 4 years ago 0

A. 8

It's nudity...ness

Lady 4 years ago 0

A. 9

It's not that bad

Lady 4 years ago 0

A. 10

Stretch

Gentleman 4 years ago 0

A. 11

Stretch

Lady 4 years ago 0

A. 12

(Moving)

Lady 4 years ago 0

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