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Re: [Phys-l] flashlight : no battery, no bulb

Also those cheap batteries stop holding a charge pretty quickly. You can buy a supercap flashlight charged by the magnet in wire coil that John describes, but they're rarer than might be hoped for and the cheaper look a likes are common.

Dan MacIsaac, Associate Professor of Physics, SUNY-Buffalo State College
222SciBldg BSC, 1300 Elmwood Ave, Buffalo NY 14222 USA 716-878-3802
<> <>
Physics Graduate Coordinator & Dept Chair Pro Tem (acting Jan-Aug 2008)

On Jun 2, 2008, at 7:46 PM, John Denker wrote:

On 06/01/2008 09:44 PM, Marc "Zeke" Kossover wrote:
And on the one I bought from them, the so-called capacitors
were in fact batteries. The magnet was vaguely magnetic,
but the wiring was completely a joke. It didn't really
connect to anything.

Thanks for the heads-up ... I wouldn't have discovered the
problem on my own until much, much later.

This is about as embarrassing as possibly could be. I gave
one as a gift to a little kid, then read Marc's note and
realized I'd been swindled.

Ever try to un-give a present? Not a good situation.

There *are* products in this category that actually work;
this just isn't one of them.

Sorry for any confusion I caused.

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