I saw those battery chargers but they say they're inoperable prototypes in the listing. But they also say they were pulled from Smart Cars with 5000 miles, so they couldn't have been that inoperable? Maybe they just mean that they don't know how to get them to work in anything besides a 451. I'll ask them to clarify I guess... there's nothing that would lock them to one car right? Tesla cars have a lot of walled-garden lockout stuff, but I'd guess the onboard chargers in 451 ED just all use exactly the same canbus commands to function.