iOS 4.2 reduces power output of iPad’s Dock Connector

iOS 4.2 reduces the maximum power output of the iPad Camera Connection Kit’s USB adapter, essentially breaking compatibility with some cameras and other devices, according to a new report. 9 to 5 Mac claims that Apple has reduced the maximum amount of power that the iPad’s 30-pin connector can emit from 100mA to 20mA, leaving many non self-powered devices, including keyboards, microphones, flash drives, and some cameras unable to connect. According to the report, connecting such a device under iOS 4.2 results in an alert that says “The connected USB device requires too much power.” As noted in the report, it is unknown whether this is a bug or a deliberate change by Apple, nor whether it will be remedied in a future software update.