> http://www.thomas-distributing.com/mh-4aa200.htm $5.77 per 4 
> pack of 1.5 volt (actually 1.2) 2AH NiMH batteries. They will 
> recharge 500 to 1000 times and can be "run-flat" without 
> damage. To match a 36V 12AH SLA pack, I would need 180 AA 
> cells or 45 packs for a cost of $259.65. Compared to $80 and 
> 100-200 recharges for the SLA, the total lifetime cost is at 
> about 1.5 times better. 
> 
> But how do you build a battery holder in a bike frame for 180 
> AA cells? 
> 
> ---


Make the bike frame out of bigger tubes.

Put the batteries in the tubes.  (My battery pack is in the seat post.)

Bonus exercise: Work out increase in drag.

Tony

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