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?

yep, same like laptop

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

my friend ipad 1 32GB can last long more than 10 days without charging... stanby mode.. not using so much

1 hour for 1%? something is wrong over there as My iPad 1 only drop 1% from morning till night in standby mode.

Ditto, my iPad behaves similarly as well. Overnight it drops about 1% if I don't turn on WiFi.

after put into sleep mode, my ipad 2 last from 100% for more than 12 hours...

it depends on what is your battery condition, if your battery can only last like 2-3 hours from fully charge normal usage, then your 1% isnt much compare to a brand new which can fully charged can last 10 hours. if you overcharge it too much or use it to 0% too often, your battery life is dramatically reduced, from what i read, they suggest do not charge over 100%, or use it till 0%, when charging, better stop when the charging is more than 95% and overnight charging is very bad.

it also depends what kind of application is STILL running when your ipad is sleeping, same to some smart phones, even they are sleeping, its still running some app, and i think ipad should be able to last much longer in sleep due to it need not to connect to telco(3g is different story), and even its much larger than phone, it dont consume more than a smart phone if its in sleep mode.

Yup, i think the running apps in the background drains it.
Try ending all the apps and out it to sleep and see if it drains as much?

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