> A thought for you is to perhaps look at using an unmodified drill pack
> in your device if you can, that way people can easily buy batteries for
> it (they do die over time) and as a result can quick swap with a few
> spare packs.

I'm sure Gargoyle knows and might even tell me - but can you advise what 
sort of  voltage, capacity, number of cells, and price are the A123 drill 
packs? I haven't used LiFePO4 as yet, but it's looking attractive. Not 
overly available here yet AFAIK (which may more reflect my state of knowing 
than their state of availability).




            Russell 

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