Which battery do I need?

[micamb]

Thanks, even with 9000mah ( which I'll probably go for ) I think 30 cells would be nice, 90 AAs and scavenged but robust B&D - rather a headache.
The interesting bits are easier to describe- redundant bb has drill on right, cassette freewheel on left. This has filed 11tooth cog which catches the drive side of the chain. The cranks have 40,55 cogs and 6 jockey wheels behind a guard. With the chain in this position the bike will run with motor and feet stationary on pedals.
Both these innovations appear, surprisingly, to work but there is some friction!
Cheers.

 

[dnmun]

why not just use a regular hub motor or mid drive motor and a regular lifepo4 pack? seems a better option. plus you don't lose the drill. it will die, and fast. you can smell it after a few minutes. my makita went mixing a bucket of paint.

 

[micamb]

It's the journey that I enjoy. since I don't really need an electric, streamlined recumbent I begrudge every £ and I consider there are drawbacks to both hub-motors and to lithium batteries.