Originally Posted by johnston1364
However this weekend the battery has died extremely quick with very little use. I found checking my battery usage that both Android OS and Android idle are using 26% and 16% of my battery which seems a bit excessive and the device was getting hot over the weekend which leads me to think something is running in the background.
Android OS and Android idle using 26/16% battery doesn't really say much. You'd need to also review what else consumed the battery (what %), and also, how long was it off charger, What is device idle time, and what was remaining battery %?
For instance, if your phone was off charger for 2 minutes, those numbers mean nothing. But if your phone was off charger for a day, and these percentages were the highest battery user among all apps, and you had a few hours of screen usage, then this would be something to look into.
For example, at this moment, my phones shows 15% Android OS use, and 11% cell standby, and 34% device idle - off charger for 13 hours, battery at 89%. I wouldn't worry about those percentages at all because I had taken the phone off the charger just before I went to sleep (after a full charge), and it wasn't used all night, and it has only been in actual use for the past 3-4 hours (with about 1 hour or so of screen-on time).
Even when you aren't actively using your phone, the OS is still running, the radios are still looking for signal, and so, those will show highest percentage.
(I hope that makes sense).
You also mentioned that the battery was getting hot. Assuming your phone was not on the charger, that is something that should be looked into - again, look at what app (besides Android OS, device idle etc) was using most battery. Are you in a good cell coverage area? (if coverage is bad, radios will be looking for good signal all the time causing battery drain)