I just got a Rad City and ordered a second battery to give a huge range when I want it. Combined with, say, two chargers and two timers ($10), the commuting possibilities are endless. I briefly thought of waiting for Juiced to get its inventory in line with its promises, but after looking at the difference between 52 and 48v., which was not all that much, decided to go this way.
A 52.v battery will void your warranty for starters...