A few days ago the percent charge showing stopped working on my pixel 4 XL stopped working. I checked my settings and the it displayed the "battery monitor" not working. Also tried depressing hard on the screen to see if this is if the battery might be swelled up. A reliable phone repair place told me that the problem is most likely due to a worn out battery. The battery is not discharging fast. Accubattery sas the battery is healthy. Is there there a hardware tool I can check to see if the battery is defective or not......?