IPhone 4 Jailbroken Redsn0w keeps shutting down and having to reboot all over again?

I have had this problem around 20 times now we even brought a new battery to see if that was the problem but now I have a jailbroken iPhone and it turns off randomly with 50% battery, awe most everyday it is quiet annoying anyone got any help?

The jailbreak is probably causing the problem. Restore the iPhone, use it like it's new, and don't jailbreak it again.

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