The best way to determine if your battery needs to be replaced is to check the battery’s performance. If your phone battery drains much quicker than normal, it might be time for a new one. Other signs that your phone battery needs to be replaced can include:
Low battery warning indicator lights up on the screen more frequently than before
Screen doesn’t work as well when the battery is low
Phone dies unexpectedly after being used for an extended period of time with little or no use (called “ battloss ”)