Originally Posted by Joh P
Well seems as all the fingers are pointing towards K9 mail, I have got rid of that and have downloaded maildroid instead so will test that out tonight and see if the drain has improved at all.
If anyone can think of any other possible reasons from looking at the BBS screen shots, please let me know.
I went through this with my s3 a few weeks ago, even with Wifi and mobile data turned off I was losing 40% battery at night. Do you have chrome installed? There is a bug in that which drains battery, you can fix it by going to chrome settings/developer options and turning off tilt to scroll. I also used better battery stats and found out that a lot of my Wakelocks in standby were to do with mobile data, something to do with a system that Vodafone doesn't support so the phone is constantly requesting something from the network. Try turning off mobile data and see if that's the problem. Once I fixed chrome and turn off mobile data when the screen is off then I get 3% drain overnight!