My phone become very hot. I off it and still it's very hot. After 30mins I on the phone again the battery drop from 90 to 30%. Is it gone case?



My phone become very hot. I off it and still it's very hot. After 30mins I on the phone again the battery drop from 90 to 30%. Is it gone case?
Its xiaomi. When I charge it again the phone starts to become very hot again. How to recover?
Change new battery.
Where to change and how much?
Can go over to SLS to look for this mobile repairs. As for how much depends on which Xiaomi phone u using. If it's under warranty , can go down to the central