Why is it crashing and forgetting the battery charge

so i have tested it so far like this, running the ipad with image slideshow for a hour or so no problem

most apps i can run for a good 30 min before i cancel the test.

when i turn on the wifi and open any browser it hard crashes to black screen and shows the indication for “no charge/low battery”

compleatly independent on what charge it says it has before.

if i try to start it after it crash it usually flashes the indicator for 2-3 atemts at start then it starts as normaly. drops maybe 10% battery at most

i have now done a factory restoration of it and the problem persist. suggestions other then a photo frame?