yeah, we just take those and put them in series to create the voltage that we want. We also parallel them for the range that we want.
My friend Ambrose takes the Bosch FatPacks and then takes them apart:
http://ebikerider.blogspot.com/2010/...-fat-pack.html
He also uses the batteries off of Makita.
It's not hard but for electric bike usage, you really need a minimum of 36v. 24v systems are way underpowered and everyone will be unhappy with those.