I agree. Time will vary but it will happen.  Google 'black wire disease'.  =
 Fwiw. Never ever solder to the cells.  Batteries plus will custom weld a p=
ack pretty inexpensively.

Al Shinn <alshinn@mindspring.com> wrote:

>A friend / client had me review a design he / we have been working on.=20
>It has 6 "D" size NiMH batteries in series and in his design there are=20
>three sets of two cells contacted with 6 spring clips. These will be in=20
>a sealed compartment with no user access. The batteries will never be=20
>overcharged or over heated but I warned him that they would have a high=20
>failure rate due to exudate from the batteries interfering with the=20
>contacts.
>Am I being overly cautious?
>All battery tools I see have welded tabs - never spring contacts.
>I will admit that all the ample corrosion products I have seen were with=20
>NiCD batteries
>--=20
>
>Looking forward,
>Al Shinn
>
>--=20
>http://www.piclist.com PIC/SX FAQ & list archive
>View/change your membership options at
>http://mailman.mit.edu/mailman/listinfo/piclist

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