Hi, the power bank charged for me many different devices, be it my cameras batteries, iPhone, Android, Bluetooth headphones and my MacBook in record time. If these devices all worked seamlessly I can't imagine that a Surface Book won't be charged too in the same manner. Hope this helps Cheers, Alex
Not possible - see surfaceforums.net for example: "To get this to work you will need a powerbank which can output 12 v at 2.5 amps it must also have a barrel connector output and the last thing you will need is the cable which is made for the surface pro 3/4 which has a male barrel connector on the other side and that's it."
RAVPower does have one but couldn't find it on digitec: RAVPower 23000mAh Portable Charger 4.5A DC Output External Battery Pack (3-Port, 9V/12V/16V/19V/20V, LCD Display)