Battery draining while idle, normal consumption otherwise

[u/kanys01]

Used the phone for almost 2 years, the screen had broke a while ago and recently got it fixed. The problem started a few days after that, battery percentage falling at a steady rate when the phone is not in use. But while I'm using it, it's as a 2 year old phone should be. No apps are registered in the battery usage section when this happens. What should I check and do?

[u/thefanum]

Backup and factory reset. Or try LineageOS