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From: Asimov on 30 Sep 2005 02:11
"H. Dziardziel" bravely wrote to "All" (30 Sep 05 09:53:52)
--- on the heady topic of "Re: replacing batteries in Norelco shaver"

HD> From: H. Dziardziel <hdzi(a)zworg.nospamcom>
HD> Xref: core-easynews sci.electronics.repair:343591

>okay. I was thinking of replacing the 2 sub-C nicads in a hand
>driver with it, as the Li-ion cell has a 1,000mA/hr spec on the label.

HD> Li-ions can only be at best pulsed at a 2-3C rate. The TH probably
HD> is the termistor and the pcb has picofuses. How will you charger
HD> it once in the driver? Li-ion aren't for casual experimenting, as
HD> you no doubt know..

The battery has its own charging smt electronics on a tiny board that
holds the contacts for the adaptor base. I would connect the existing
driver terminals to these contacts and not directly to the battery.

I was so impressed by an experimental electric sports car I saw on
Alan Alda's science show. It went 0-60 in 3.2 seconds and a top speed
over 200. Consider that not many gasoline powered cars can do that. It
was powered by a bank of Li-ion batteries. It must be quite
breathtaking to press the accelerator sitting in that car. Oooh, the
G's, the G's!

A*s*i*m*o*v

.... Wasted power is current squared times the resistance.

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