Originally Posted by CliffordK

I see previously expensive E-Bikes sold for pennies on the dollar with missing or dead batteries.

Perhaps check:

Battery type:

• Lead Acid
• NiCad
• NiMH
• Lithium
• Etc.

Charger and type?

Interface?

Can you purchase replacement batteries and components?

Do you wish to hack something together on your own?

Hardware tool batteries?

I just purchased a little electric chainsaw & lawnmower. 40V, 4 AH modular battery packs. It looks like some E-Bike Batteries have similar voltages, but higher AH rating. Nonetheless, a lot will depend on your actual needs.

Keep in mind.

Serial connections ==> More volts
Parallel connections ==> More Amps or AH.