My new tablet Onda vi40 keep crashing for no reason.

[[SPARTACUS]]

I've got my new Onda vi40 and after I've deleted some Chinese applications he started shutting down for no reason. Now, when I turn it on he stay turned for about 5-10 minutes and then he just shut down .Can someone please tell me what's problem ?

 

[JBL]

Simply RESET it..!!

 

[[SPARTACUS]]

Done, but problem is still here. When I charge the battery to 100% and after that I can use it without problem. But if I shut down, then when I start it again he goes down every couple of minutes. Any suggestions JBL ?
btw, thank you for you answer.