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Date:         Wed, 12 Jun 1996 20:26:41 -0400
Sender:       Vanagon Mailing List <vanagon@vanagon.com>
From:         30erainey@sophia.sph.unc.edu (Eric Rainey)
Subject:      Re: Rechargeable battery help

One of the things that can go wrong with rechargeable batteries is that as the metal plates out upon recharging it tends to form, well , stalagmites (for lack of a better term). Eventually, these stalagmites can bridge two plates, rendering that cell useless.

Prevention: Completely discharge the battery before recharge (can be a real drag and really inconvenient).

Cure (Theoretical): Get a really big capacitor, like the kind you might have found in a Who tour amp, charge it up, then discharge it to the battery. I say "theoretical" because we tried to do this in my high school electronics class, with very poor results. This doesn't mean it won't work; the battery/capacitor we were using might have been defective for other reasons, or whatever.

Good luck, Eric.

PS. You could always find the Voltage/amp specs for the motor in your drill and make your own battery setup.


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