Ipad Battery Draining When Not In Use. If your iPad has cellularmobile data service like 4G or LTE you can also open the Cellular menu here and turn off the Cellular Data switch. I think I actually managed to solve the issue at least in my case.
Step 1 Open the Settings app on your iPad. If you see an app frequently listed under Latest Crash then that app is very problematic and drains a lot of battery power. Several users report an issue in which plugged in iPhones or iPads charges to 100 BUT THEN slowly drain down while it is still plugged in.
Apple states There are two simple ways you can preserve battery life -- no matter how you use your device.
Then drag the app to the top of the screen to force-quit it. Letting the iPad completely drain to 0 and die seems to have fixed the problem the battery is pretty much not draining at all on standby mode anymore. So we expect that kind of discharge. Step 1 Open the Settings app on your iPad.