Battery Jumping on Redmi 5 Plus

[Eurilexa]

Hi, I'm using redmi 5 plus 8.10.18 eu rom
when i charge my battery it charge fast like 1-2-3-4-5 in a sec but when i unplug it drains quickly in a secs like 90% to 80% in just 11 minutes screen usage, hope anyone can help me with this problem.

 

[Pertti Kosunen]

Might be dead battery, how long have you had it?

 

[Eurilexa]

Thanks for replying. The battery was fixed when I switch to custom Rom (ressurection mix)