I'm using CM12.1 and facing backup problem just like you. And what else we can expect from a 1700 mAh battery:(
Yes you are right and for a mean while i forget that it has 1700 mAH battery.:p
Just for the info i want to know how can i integrate the CWM or any other recovery images into the kernel.
Whats the actual procedure to do this.
I just got a github link which according to me contains MTK 6577 kernel source can someone confirm is it the real kernel source or not