One of my email accounts uses Microsoft Exchange. I have push enabled. The "checking for mail" action happens once a second, continually for this account only. The battery drained from 85% last night to 40% when I got up this morning. I changed the account from push to fetch, and set a 15min. interval. That solved the problem, but of course I don't get email instantaneously anymore.
My hotmail account has push enabled, I get email immediately and it doesn't check for mail every second like the exchange account.
My old iPad 1 had push enabled for exchange, and it worked just fine.
Anybody else using exchange, that has seen this problem?