Up until last Sunday, my Galaxy Samsung 3 was charging fine and would hold the charge for at least 16 hours. suddenly, it started losing the charge - would charge the phone over night and by 10:00 It was advising me to plug it in to charge. My data was on, but not wifi. My son put an app on to turn off data when not in use and it did not solve this problem. The phone holds a charge for about 1 hour now. And, it will look fully charged, then within seconds drop to empty without even using it for anything. I bought the phone in December 2012 or January 2013.