I have a Blackview Tab 7 Wifi tablet. The last few days, I've been using it (solitaire, mahjong, ebooks) for five or ten minutes when I get a message (from AccuBattery) that my battery is at 55 degrees Celsius. I turn it off for a while, then turn it on again and the same thing happens. What could be causing this, and what can I do about it?