Hi there! My Samsung Galaxy S3 won't hold a charge past 31% as on this past Sunday. No matter what charger I use, it will not go over 31. a couple of times I turned it off and charged it or on airplane mode and it went to 100, then the second I unplugged it, it went down to 70%, then quickly to 20. Like within a minute. I installed and antivirus but that did nothing. I've restarted, removed the battery, etc. It's not like an eventual drain either, it was holding about 9 hours of charge until this!