Why Does My Phone Battery Go Down When Charging. Even as my phone stays idle during the night I wake up to missing battery life. As you already know your phone battery is made of Li-ion.
The topmost reason why your battery percentage is going down while charging is because of a worn-out or damaged battery. We recommend turning on this setting so you can get the most out of your iPhone battery for a longer period of time. This situation calls for some troubleshooting actions.
Answer 1 of 5.
Most phones encompass a lithium-ion battery which has a specific lifespan. Turn On Optimized Battery Charging. We recommend turning on this setting so you can get the most out of your iPhone battery for a longer period of time. If you use a different charger and it works then the problem is your charger.
