Battery pack failure (was Quirky and amusing things...) [RE-wrenches]

[Todd Cory, Mt. Shasta Energy Services]

I always thought NiMh batteries had greater energy density than NiCd's, plus the
fact that they have no cadmium to worry about in the landfills made me think
they were the superior rechargeable battery... am I wrong here?

Todd


"Phil Undercuffler, Positive Energy" wrote:

> I have an 18 volt NiMh Bosch had a similar failure, although fortunately not
> quite so catastrophic nor so near my gonads.  I was fastening rake flashing
> on my metal roof, screwing through three layers of tin.  The drill was
> bogging down in the last few threads, finally stalling out.  I gave the
> drill a twist to seat the panel, and suddenly everything went zap. I pulled
> the battery out of the drill, and watched a 3/4" blister form on the head of
> the battery pack.  Needless to say, it became an $80 doorstop.
>
> I've never been quite so impressed with the NiMh's capacity/longevity, but
> that was the last straw.

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