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

158 views

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

6 Answers

Anonymous 0 Comments

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.

Anonymous 0 Comments

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.

Anonymous 0 Comments

The voltage of a lithium ion battery at first drops slowly as it is discharged, and then this speeds up lot as it approaches 0%. Maybe the phone is measuring battery level based on voltage, and isn’t taking this into accoount.

Anonymous 0 Comments

The voltage of a lithium ion battery at first drops slowly as it is discharged, and then this speeds up lot as it approaches 0%. Maybe the phone is measuring battery level based on voltage, and isn’t taking this into accoount.

Anonymous 0 Comments

The battery percentage (state of charge) tells you, approximately, how many electrons are stored in the battery. Current is a flow of electrons. Voltage can be interpreted as how much energy each of the electrons has. Power = Voltage x Current. At higher state of charge, battery voltage is higher, meaning, to deliver the same power, less current is required. I.e., at a higher state of charge, each individual electron has more „energy“.

Anonymous 0 Comments

The battery percentage (state of charge) tells you, approximately, how many electrons are stored in the battery. Current is a flow of electrons. Voltage can be interpreted as how much energy each of the electrons has. Power = Voltage x Current. At higher state of charge, battery voltage is higher, meaning, to deliver the same power, less current is required. I.e., at a higher state of charge, each individual electron has more „energy“.