Why is my phone battery dropping quickly then going back up after a restart?

[Android Central Question]

've noticed that my phone rarely just begins dropping quickly, around 1% a second, but when I restart it, the battery jumps up to around 20% to 25%, often acting like it hadn't just dropped to 0% in a matter of seconds. It makes no sense why it seems to be happening at all, but it just happens out of nowhere constantly.

 

[mustang7757]

Which device?
Soubds like a battery issue.

I'll leave a Link to register so you can communicate here as a guest account you can only post questions but can't reply

https://forums.androidcentral.com/ask-question/409154-join-android-central-community.html

 

[belodion]

I see similar behaviour in an aging iPhone. I take it to be a tired battery, a faulty battery chip, some piece of rum software, or just a problem with the entire universe.