Charger:
I temporarily parallel up the batts and charge them with a Vector on 6A (1.5A per batt).
Controller:
Yi-Yun 36V YK-40 running at 48V
Conversion time and cost:
$36 from eBay, plus two more batteries.
Curb weight:
10 lbs. plus about 15lbs of batts in the backpack.
Heater:
Californians don't need heaters. Air conditioning, son.
Lighting:
3 super bright LED headlights. It's got tail lights, too. (I had to deactivate them for the mod, though.)
Miles as an EV:
Pfft, I don't keep track.
Top speed:
~20-25mph. Dude, 48V on this thing is the best thing EVAR.