my phone is turning off and on every thirty minutes and I can't remove the battery

[Cornelius_3]

My phone turns off and on by itself every thirty minutes and can't remove the battery

 

[Cornelius_3]

MERGED QUESTION
Question from Cornelius_3 : "My Android turns off and on by itself and the battery is built in"

My Android turns off and on by itself and the battery is built in