How do you tell when the battery is done charging?

MP3 players Sansa Fuze
1

I read it somewhere but I can’t find it again.

2

@shenanagins1091 wrote:
I read it somewhere but I can’t find it again.

The battery icon stops flashing.

3

It didn’t stop flashing but it says 100% charged.

4

@shenanagins1091 wrote:
It didn’t stop flashing but it says 100% charged.

Wait it stop flashing. Mine stops flashing when it is fully charged.