I spent about 3 hours last night rewiring my new Bosch Fat Pack 36V batteries for my new commute today. It fits nicely into the Topeak MTX rack bag and the wires are almost invisible. I used about 6.5AH of power on the way in at 36V, it didn't feel as peppy as my old 48V SLA setup, however, the lightness of the pack at around 15 lbs certainly made the bike feel much peppier and much easier to lift and move when stationary. I think I'll need to up the voltage to at least 48 if not 55.5V to increase my power since there are many more significant hills going across town.
More photos later,