ok, so i recently heard that in order to keep the battery lasting a long period of time you should charge the battery when it's at 10% all the way to 100% without any disruption. So i did this for a while now. The problem now is that when i hear the phone beep that it is at 100% i disconnect it, and like a few seconds later it reads that it is at 90% charge level. it barely started doing it and it has me a bit worried. is there anything i should do, or be worried about? thanks.