On 31 Aug 2003 09:54:00 -0700, wrote:

I've been using the Panasonics in parallel for 4 years, changing out one each
year, and it's never faded. I cranked a 200 hp IO-360 12 times, 15 secons per
crank (mags off) then stopped for 60 seconds to let the starter cool off, and
they were going strong on try #12, no apparent slowing from the first crank.

This is contrary to the recommendation of Panasonic. See page 7 of:

http://www.panasonic.com/industrial/...orHandling.pdf

If you must connect two batteries in parallel, the electrical
properties should be balanced. Practically speaking, this means that
both batteries should be of the same age. Otherwise, the fresher
battery will be accepting most of the charge current. Over many
charge cycles, the imbalance will increase.


Rob-
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Robert Cherney e-mail: rcherney(at)comcast(dot)net