The recent release of iOS 4 was eagerly awaited by iPod Touch owners, so much so that the update server was overwhelmed. However those who’ve completed the upgrade are complaining that their battery life is horrible. The Apple Support forum is full of complaints that the iPod Touch battery drains quickly even with little to no use.
I am an iPod Touch owner myself and I can confirm that this issue is real. Before I upgraded to iOS 4 my battery life was excellent. I could go several days between charging. After I upgraded I set my fully charged Touch on my desk and 8 hours later it was down to less than 20%. Some are speculating that the poor battery life is the result of the new OS’s persistent WiFi feature. Previously the WiFi was turned off whenever the Touch went into standby/sleep mode. Why Apple chose to change this is unknown. I’ve started turning the WiFi off when I’m not using it and my battery life has improved significantly. Really though, we should have to do this-it defeats the purpose of having push notifications and email.
Apple has not yet commented on the issue but hopefully they will issue a patch or update that will revert the WiFi connection back to turning off in standby mode. If you’ve upgraded to iOS have you found your battery life suffering? Let us know!