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April 10, 2007


Stephen Malone

Thanks, I'm on my way to wally-world.

Chris Byrne

Actually, I'm an Aerospace Engineer (AE by education), and for some reason I didn't notice this post 'til now.

Unfortunately, you're right, charge and discharge in all storage batteries is significantly non-linear. Also if you overload a small charging system, it simply wont charge; it will uselessly build up heat in the charger.

There are formulae to estimate the minimum charging capacity necessary to usefully charge a battery system, but I don't have them handy.

That said, I think a moderate increase in charging capacity (a few hundred mah, or maybe even a full amp hour) wouldn't cause too much of a problem.

Your best bet is to measure the dynamos output on a multimeter before soldering up the pack.

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