Some Surface Pro 3 units refuse to charge, Microsoft is "aware" of the problem
Owners of the Microsoft Surface Pro 3 with an integrated LG power pack have complained of a problem that prevents the tablet/laptop hybrid device from charging. It's a nasty bug to deal with, as it will prevent owners from using the device while not connected to a power outlet. With the battery fully discharged, the device will shut down instantly, without saving any of the work you've done.
Things that are NOT allowed: