Why is my battery life won't reduce even if I'm using it, and now i don't know when will my phone wi

[Android Central Question]

The battery life wont reduce but then if I turn it off remove the bettery, then put the battery again then turn it on the battery percentage change, it only change when i turn it off

 

[B. Diddy]

Welcome to Android Central! Which phone? Did you ever replace the battery?

Try using it until the phone shuts off automatically from low battery. Then charge up to 100% again, and see if the battery indicator is more accurate now.