Tablet won't start

Jun 25, 2018
4
0
10
It's not this tablet it's the other one hold 20 seconds nothing and how do you get in to the battery ,it was Finn watching the u tube just went out just won't turn back on
 
Jun 25, 2018
4
0
10
Nothing to do with the charging,I put it on to watch my tube, five minutes tablet just went out,nothing to do the battrey it would tell menus I already had the lead in just went off now still can't find out how to put it on