Why phone battery from 90% to 80% last longer than from 10% to 0%

Question

Title… I can use smartphone for a while from 90% to 80% or 80% to 70% but from 20% to 10% or 10% to 0% the time is much shorter.

In: 4

Answer 1

Two possibilities:
1. Have you actually measured the time or does it just feel like it drains faster at low battery? Most likely this has more to do with your perception of time and less with the phone itself.

2. The phone might shut off when it reaches 2-3% charge, with multiple reasons: a) you can still turn it on again to make an emergency call. b) it is able to show you the “no battery” screen if you try to turn it on, so you don’t think it is broken. c) if the battery gets completely discharged, it might have a negative effect on future performance of the battery and will take way longer than usual to get charged again.