The battery inside the tablet is an 8,400mAh unit, which is comparable with the current iPad lineup, and good for about six hours of sustained runtime, which translates into "all-day" of regular use.
How to: Go to Settings > Display on your Android phone. There, you'll find the option to switch between a light and dark theme and to have dark mode turn on automatically at a certain time of day. I ...
Before you select the factory reset option for an old phone, make sure you've gone through these steps before its too late.