I've started the process and will soon be giving up my car for an ebike. I've got the "donor" bike (a Townie 8 with 700c wheels). I'm going to buy the Crystalyte Phoenix to run at 48v, but I DON'T want to use SLA or NiMh. So my one hurdle is the darn battery.
I came across this:
They have a 10Ah 24V LiFePO4 Battery including: charger and shipping for like $500. I'd have to wire them together in series? I really don't know squat about electric doodads and such, but I'm good at following directions.
Anyhow, the site claims a 2 to 3 thousand recharge life.
I was thinking about building a pack from the Dewalt a123's but it just looks too complicated for me. There isn't anyone selling 48v (ish) a123 packs, are there?