Im not sure what happened, but recently my battery life has gone way down. For instance, Its been only 6 hours since its been pulled off the charger (fully charged) and its been completely idle on WiFi, and the battery life is at 13%. When I plug it into USB for charging, it gives an error saying that its using more battery than it can charge. Which is really not normal, especially when its idle. So I think something is definitely eating up my battery but I'm not sure what. Is there an app to find this out?