8520 red mark with battery on display

[Steelers champions!]

phone is redlight and need to update but it
display red mark with battery and can not be flash

 

[the_awesome_possum]

1. try to use other battery
2. try to put it on charging 2-3 hours

 

[MiiSS B3CK3Y C33]

mate even without a bettery it show the same

 

[Donald I]

mate, but did you tried to use other?