Apple has released their latest update today to help fix the battery issues that have plagued the iPhone 4S since its launch. There’s also a security fix in this update for the iPad 2 issue whereby a Smart Cover or similar allowed limited access to a passcode locked device. This update is compatible with iPhone 3Gs, iPhone 4, iPhone 4S, the iPad and iPad 2 and 3rd and 4th generation iPod Touches. So, to get going with this, just plug your idevice into iTunes and get downloading – beaware though this update weighs in at just over 55 MB.