k2m2_01If your phone is working fine then don't install the update, if your luck goes the wrong way then you may not be able to recover the battery.
Is this version safe to install? I'm confused if the issue is the build software or the damaged battery by the OP. I especially don't want to get into the hassle of backing up, clearing and reinstalling for a version that was faulty to begin with.
I appreciate any clarifications.