3 ms·

Is that really the case? You've always been able to simultaneously charge and sync your iDevice with your Mac.

• ygra 12y ago
  As far as I know you can get only up to 500 mA if you specifically request it. Ports that support more (e.g. on dedicated chargers) have their data lines shorted and thus you cannot transmit anything. So you can charge your device, it just takes ages. And might even discharge slowly if you still have the screen on.
  • LaikaF 12y ago
    They're talking about plugging a keyboard to your phone (or tablet) while charging it.
  • gambiting 12y ago
    That's what the spec says, but that's not what most manufacturers are doing. With many motherboards you also get a driver that overrides the hardware limitations and provides up to 2.1Amp to a USB device, regardless of whatever you are communicating with it or not. And only a very very very small number of devices actually requires the data lines to be shortened together - PS Vita will not charge from a charger which does not have these to lines shortened together. Even the dedicated Apple USB charges don't have the data lines shortened together and pretty much everything charges from them(apart from PS Vita), so very few companies keep to the standard here.
• Pxtl 12y ago
  Notice the dearth of SoundDock-like devices for Android? That's what I'm referring to. Devices where the android phone/tablet device is (a) being charged, but also (b) hosting a speaker (or wired gamepads or whatever).