Nabi Jr power issue
We've had a pair of Nabi jr tablets for about 6 months, my youngest daughters Nabi jr seems to be having an issue. % days ago, she brought it to me, because she said it wouldn't turn on, assuming it had been off the charger, I told her to put it on and the next day she could play with it.
The next day comes and I go to check on it, I unplugged it from the wall charger, and tried to turn it on. Nothing, just a blank screen, so I plugged it back in, and noticed the screen flicker a second, not light up, but flicker like the screen got power, so I pressed the power button and it turned on. \
After booting up the battery said 0%, so I went into setting and to battery and it says Battery 0% status Unknown. I've tried everything to figure this out, I even took the back cover off to check the battery, and using my multimeter, it says the battery is getting the charge. But for some reason it won't run off the battery, only when it's plugged into the wall charger.
Any help would be greatly appreciated.