@Kakakrroto
1. which Gapps Version you have installed?
2. Was it a clean install ? Or dirty flash ?
3. You have to recalibrate the battery
4. How old is the battery?
1. which Gapps Version you have installed?
BiTGApps-arm-13.0.0-v1.8_signed
2. Was it a clean install ? Or dirty flash?
Clean install with all cleaning (cache, data, system etc), and data formatting.
3. You have to recalibrate the battery
I used this method:
1. Discharge your phone fully until it turns itself off.
2. Turn it on again and let it turn itself off.
3. Plug your phone into a charger and, without turning it on, let it charge until the on-screen or LED indicator says 100 percent.
4. Turn your phone on. It's likely that the battery indicator won't say 100 percent, so plug the charger back in (leave your phone on) and continue charging until it says 100 percent on-screen as well.
5. Unplug your phone and restart it. If it doesn't say 100 percent, plug the charger back in until it says 100 percent on screen.
6. Repeat this cycle until it says 100 percent (or as close as you think it's going to get) when you start it up without it being plugged in.
4. How old is the battery?
I don't know, I bought the tablet a month ago, it could be original. In my country the device was launched in 2015.