Recommendations for Battery Tenders
brett at cloud9.net
Tue Jul 26 09:00:50 EDT 2005
On Jul 26, 2005, at 6:55 AM, Kneale Brownson wrote:
> Battery Tender IS the name you want. That's what I use for the
> battery in my '37 Graham. However, why should you need one? A good
> battery should be able to sit unused for quite a while if the car's
> electrics are in good shape.
"A battery stored at 95° F (35° C) will self-discharge twice as fast
than one stored at 75° F (23.9° C)."
Also, in summer heat, alternators can put out less if thermally
regulated, and there's more demand on them from radiator fans
(especially type 44s), so battery state of charge can be much lower
in the summer.
Battery Tender is not actually manufactured by the company someone
else sent a URL for; they're re-labelled by Deltran, the owner of the
"Battery Tender" trademark. I don't have the name handy, but there's
a company that makes OEM units used by Battery Tender, Yuasa, and a
Best source is usually a motorcycle and/or ATV dealer. The wall-wart
units (usually 500mA) are okay for a perfectly charged car battery
with no parasitic load, but I'd recommend the 1.5A unit for a car
battery, since it brings the battery to a full charge (in a
reasonable amount of time) and has enough capacity to handle battery
self-discharge on even the heaviest parasitic loads. You typically
get permanent-hookup, fused leads (w/quick disconnect connector) as a
side bonus as well.
Griots is a silly waste of money all around, not just on battery
chargers- I believe they were selling the Porter-Cable RO buffer at
almost 100% markup OVER what a tool store was selling them for, plus
they were not including the second counterweight and sanding pad.
"They that give up essential liberty to obtain temporary
safety deserve neither liberty nor safety." - Ben Franklin
More information about the quattro