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re: where to put the batteries?
6 apr 1999
wrote:
>nicksanspam@ece.vill.edu wrote:
>> wrote:
>>> warmer is always better for your battery investment.
>>wrong. heat kills batteries (raising their temp from 50 to 80 f halves
>>their lifetime, as i recall), and makes them discharge faster. otoh,
>>30 f batteries are harder to charge and have less available capacity...
>so what you are telling me is that normal temperatures (50-80f) is bad for
>batteries?
yup, especially at the high end. cold preserves things, like walt disney.
(we yankees often say "are" instead of "is" with plural subjects.)
>i live in southern louisiana and if what you are saying is true,
>i should be going through batteries like water.
it's a matter of degree, ie numbers.
>my auto batteries last 10-15 years with no maintenance.
congratulations.
>i can get more life out of them if i lived in a cooler climate?
maybe.
>growing up in upstate new york i can remember many dead batteries
>on cold winter mornings but remember none that failed in the summer.
congratulations.
>...everything i've read in this group on batteries refutes your claims
>about temperature effects. since you didn't cite specific references
>i won't either.
this group has a phenomenal combination of ignorance and arrogance.
here's a clue: ases passive solar pioneer steve baer's zomeworks corp
at (505) 242-5354 sells lots of passive cool cell (tm) temperature
regulating battery boxes to phone companies and others who need
battery backup in warm climates. their brochure begins:
why you need a cool cell
many battery manufacturers reduce their warranty period by an aging
factor for each month the battery is operated at an average monthly
temperature above 77 f. one manufacturer reduces the warranty by 50%.
don't leave your battery unprotected!
cool cells appear to be ordinary insulated enclosures with metal roofs.
unlike other enclosures, they cool themselves in the summer, but do not
freeze in the winter, maintaining an ideal environment for batteries and
other electronic equipment. they operate without moving mechanical parts.
their behavior is governed by a strange property of water--that it is
most dense at 39 f. on summer nights warm water circulates beneath the
metal roof and the cool cell chills to near the ambient low temperature.
during the heat of the day circulation stops and the inside temperature
rises only only a few degrees. in winter circulation reverses; warm 39 f
water sinks and cold 32 f water freezes next to the metal roof...
nick, with his bare feet on a nice cool 1" steel plate at the moment.
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