Porsche Battery Maintainer
Brett Dikeman
quattro at frank.mercea.net
Tue Apr 11 19:11:20 EDT 2006
On Apr 11, 2006, at 6:18 PM, Michael McLaughlin wrote:
> This may be a dumb question, but is there any reason Porsche's
> battery maintainer that hooks into the cigarette lighter wouldn't
> work on other cars?
>
> http://tinyurl.com/rclam
Nope, but a Battery Tender, Yuasa maintenance charger, or similar
(there are a bunch of companies that sell essentially the same unit)
would probably be cheaper than Porsche's gizmo (which does look nice,
but probably does the same thing as everyone else's gizmos). Cut the
cord off a cigarette adapter or pick one up at Rat Shack for a few
bucks, and you've got exactly the same thing for your non-Porsche
maintenance charger. I think Battery Tender offers an accessory cig
adapter. Mine came with a quick-disconnect adapter for hard-wiring
to the car (with fuse) and a set of jumper leads that are also quick-
disconnect (looks like a two-pin version of those old trailer harness
connectors.)
FYI, the small rectangular solar panels don't do much except
offsetting self-discharge and some of the parasitic load from the
car. Mark Chang tried one on my recommendation for his S4tt and the
battery was dead within a month; I think the S4 has too many gizmos
drawing too much juice. I think we also determined his battery was
on the way out anyway.
My Yuasa does a multi-state charging profile (bulk, absorption,
float) and every 30 days will re-run the charge cycle...though I have
never left it on the charger for 30 days. Vector makes a bunch of
chargers, but they're strictly "charge the battery" chargers, not
maintenance chargers, no matter what they claim; they don't have a
float stage, and actually discharge the battery slightly when left
connected.
Before storage, even with a maintenance charger:
-clean the terminals and case
-disconnect one clamp if you're leaving the battery for an extended
time (over a month with charger, over a two weeks without, especially
in the summer when batteries self-discharge faster)
-top off any cells with distilled or deionized water if they're in
need (usually, just at the bottom of a "collar" in each inspection
port. Check with the battery manufacturer. No plate material should
be exposed.) Do NOT use tap water under any circumstances. Check
the plate color- they should be roughly uniform.
-fully charge the battery using a proper multi-stage charger with at
least several amps charging current and re-check levels.
Best place to store a battery is in a cool location, again with a
regulated maintenance charger. The old myth about concrete floors
does not apply to modern batteries with plastic cases.
Brett
More information about the quattro
mailing list