I didn't change any setting,didn't install any apps recently but sometimes, it reduced 10% overnight,sometimes,30%. I don't know what's going on here. Just feel powerless.
I don't want to make you feel worse but there is probably something wrong with your set up. If I leave my playbook in standby for 12 hours I only lose about 5%. Do you have any sideloaded apps? Perhaps they are causing you grief.
Mark
No,no sideload apps. I set behavior as pause, disable BT, the only other thing I can do is set airplane mode I believe.