Ok....i have a galaxy note 10.1. I plug the charger in and it says its charging. But the percentage never gains. So after looking around i decided i need to replace the battery. Installed the new battery and still the same thing. New battery came with about 50% charge. I plug in the charger and it says its charging but it always stays around 50% unless i turn it on then it will slowly drop like normal when not plugged in. Bill W.