I have an electric scooter which at this point is mostly composed of custom components. It's got a 600 watt motor and a 36 watt 20 amp hour battery.
I replaced the included 12AH battery with a home-brew Lithium-Ion battery - I got the cells from used laptop batteries. The cells have roughly half the capacity of the cells when they were new, but it's still far better than a lead acid battery. If you're curious how to do this: Carefully dis-assemble the laptop batteries and run each cell through a battery testing kit, it's important to have the capacity of the installed cells roughly matched. Sometimes a few cells will be much more aged, one such cell can severely limit the capacity of the whole pack. Then wire it up with a control board such as one can purchase from www.batteryspace.com.
Anyway, I would like to transfer this 20AH Lithium ion battery to an electric bicycle. The Bionx kit seems like it allows you to peddle and use battery assist, I really like this. There's no point in switching over from a scooter to a bike if it still will not be practical to peddle. The problem is, all Bionx kits come with a battery. This seems to indicate important circuitry is included in the battery component.
Are there any kits with the same features as Bionx that are compatible with a user added battery? Or is Bionx actually compatible with non-Bionx batteries?