Quote:
Originally Posted by Wilden
Just wondering, since the consensus here seems to be that more batteries is better, what do people think of using AA batteries.
You can get a pack of 4 2.7amp 1.5v rechargables for about £5 here in the uk, sometimes cheaper. If you got a load of these, and set them up to output 72v and maybe 100amps would that be as effective as using barger batteries? And more importantly, would it be cheaper?
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Although I'm still in school for EE, just doing a little math here.
to get the 72V from rechargable AA (which only put out about 1.4v) comes out to needing 51.4 batteries wired in series. So we'll say 52 batteries since you buy them in packs of 4.
Then to get the 100A from 2.7A, you would need 37 strings of batteries.
37 strings of 52 batteries would equal 1,924 batteries, (or about 481 packs of 4).
481 packs at £5 would be £2,405 (US$3496-ish).
I'm thinking you would need to create your own holders for the cells unless you can solder a metal strip to the tips and then bolt a wire to the end of that.
Other than being tedious like order99 said, how does that compare to other options cost/ weight wise?
Off subject, I thank everyone for their input, this has been a very interesting read for me.