Solution only if root and CWM installed.
Originally Posted by link_it
when i charge my zr, it show 90-91% then suddenly show 100%, battery full. how can i fix it???
If you are on root and have a recovery like CWM installed, then boot to recovery, then go to advanced and there must be an option to clear battery stats or something (I don't remember exactly :P). You must do this only when you have kept your phone switched off and then charged it to 100%. Then only do it, then it would clean the junk battery data and recalibrate battery.
If the same issue persists, "your battery may be faulty".
If you are not rooted, then I am sorry, I am not aware of any solution if there is any.
Press thanks if I helped.