Reboot Problem

[Geri0101]

For a couple of days my phone is rebooting continuously and doesnt stay on for a long time. I thought that was a soft problem and i started reflashing to miui v5 but nothing changet the problem remained. the phone stays on when is plugin to power but when i take it out is starting to reboot. What would be the problem?
Here is a video with the probleme.


https://drive.google.com/file/d/0BwKZFGbpYUnGVEk5NUJDYk5oTEU/view?usp=sharing

 

[cypher]

maybe a battery fault.
you should try to grab a new one. try to choose an original BM20, you can find on ibuygou.

 

[Geri0101]

i was thinging is the battery