The ProMark website listed replacement parts such as an extra battery and spare blades but no way to order them. An email to their support line went unanswered. After finding that the ProMark drone seemed to share at least a mechanical similarity to a Syma drone I went to a website carrying Syma products and ordered an extra battery and some spare blades. They arrived last night.

The battery came packaged in a fully functional toy police car with instructions to take apart the car to get the battery. Literally just stuffed in the empty space inside the car (which motors around, making noises and blinking its LED headlights just fine on a pair of AA batteries). No doubt this is to get around shipping restrictions for LiPo batteries. I thought it was really funny and kinda clever.