iPad 2 Wi-Fi-Only owner here. I recently [Monday] installed the iOS 5 Beta on my device, and I'm noticing a strange battery issue. For starters, when I'm actually using the device, battery is consumed normally. No apparent drainage. However, when I set down the iPad for a few hours [by putting it in sleep mode] and come back to it, the battery is completely depleted. Has anyone seen this type of issue?