How much power can be drawn from the iPhone/iPad lightning connector by a external device? Update: The use case is a audio-related device for iPhone/iPads. It would require around ~100 mA at 3,3 ...
I want to know this as I sometimes leave my iPhone unattended while syncing and I want to make sure that there's no cut off to the iPhone sync.
Is there any straight forward way of preventing an iOS device from sleeping? The only way I found so far is to open the "Music" app and start playing (and muting the volume if I don't really want to ...