Did anyone ipad2 battery drain slowly in sleep mode? i off my wifi, disable push-notification, disable location service, quit bluetooth, quit all the app. and let it in sleep mode, after 2-3 hours, the battery will reduce 2-3%, is this normal? everyone also like that?

so that mean if we didnt use it for 1 day, the ipad2 battery will automatic reduce around 8-24% ?

as i say in my first post i off my wifi, disable push-notification, disable location service, quit bluetooth, quit all the app(include background app).
but after using the ipad until 20% and turn of the power overnight then recharge it today, seem ok already.
btw, thx everyone for reply