My Galaxy Note battery out of shape due to over charge or over heating. Most of the time Im leaving it overnight to charge. That the main reason why my battery have bump and out of shape (like a pregnant lady). When I close the battery back door I could feel its not tight as new.
So, I just buy a new original one. Same replacement for RM109 at GIANT supermarket sell by Nokia small shops inside Giant. 3 month warranty.
Symptom on your phone will be flickering and phone suddenly switch off even though it shows 30 or 40% battery left. Clean battery stat will not help....
GET A NEW BATTERY! and make sure its original.... :)
GET A NEW BATTERY! and make sure its original.... :)