Originally Posted by Ryou_Concord
Can you charge and mount USB at the same time with this thing?
The realization that there's only one USB port on this device made me wonder if it shared this limitation, and from what I've read, it does. Can anybody confirm this? I can't settle for rumors and stringing together nebulous conjectures. Once they appear in my local Best Buy/MicroCenter I'll be testing this myself, of course.
If anybody's got it, I'd really like to know that. That's kind of the deal-breaker for me. It was the biggest reason I didn't get the Venue 8 Pro (that, and lack of reliable video-out). I don't mind carrying a host cable around with me everywhere either, or the spare battery... or even a tiny USB hub. I just want to know that I can use USB and charge at the same time so I can have a very mobile "desktop" experience wherever I decide to bust out my tablet. No more damn Chromecast bugginess, no more damn finnicky MHL connectors.
I know that the Venue 8 Pro simply cannot do two at the same time; I tested this fact in the store by connecting a host cable, a power source (2.1amp rav power backup battery) and a USB thumb drive. Mounts just fine with a USB OTG cable, but will just not mount and charge at the same time.
Very few devices can. Most USB Hubs cannot backfeed power, so you cannot use USB host adapters to a powered USB hub to charge the tablet most of the time, regardless of if it actually supports charging while in host mode, there is a raspberry pi compatibility list which lists a few hubs which can or cannot backfeed power (the pi can be backpowered via its USB host ports but this is not recommended and can conflict with other inputs). Most tablets though require the D+ and D- wires in the USB connector to be shorted together to enter charging mode, otherwise they will only trickle charge (or not at all), with D+ and D- shorted you cannot transmit data. Turns it into a case of data or power only.
Frankly, you want the desktop experience, yet are purchasing something running 32 bit windows on an intel atom wih 2gb of RAM and either 32 or 64gb of eMMC storage. I think an i5 device would probably be more up your street, most of them have separate power supplies and USB host ports.