I recently ordered a electric skateboard off eBay. I bought a super beefy mountain board with a lithium battery pack in non-working condition. All I knew at the time of purchase was the the battery was not charging and the skateboard had never been used. The skateboard arrived and within 1.5 hours of using my own capacitive charger, Da Pimp, I had it up and running. Today I took it out for a two mile ride and it did great. I posted a video explaining how I recovered the battery.