The tablet is quite old now, so whatever is good about it is.
The battery capacity was measured with a relevant instrument from 0% to 100% at 2650 mAh, in 3 consecutive full discharges - charges. This amount is about 60% of the reported capacity, so I cannot be happy about it. However, it gave life to the tablet because if this option did not exist, it would simply be in recycling. With this battery, it gained a decent autonomy and in combination with a custom ROM Android 9, the GT N5110 goes through a second youth, being fully functional and reliable for all daily tasks despite its age. (Note: the tablet opens very easily by removing the back cover in the usual way with a sharp plastic and then the battery comes out by unscrewing 8 screws, if I remember correctly, and disconnecting its contact.)