Battery chargers
08-22-2002, 08:06 PM
#1
Battery chargers
what kind of battery chargers do you guys use for off-season, or weekend driven cars. I saw a model that attaches to the battery and has the 110 3 prong on it. Just run an extension cord and the battery is maintained. But, I haven't been able to locate another. Any suggestions on what to use?? My car eats batteries while sitting(which it does alot 
08-23-2002, 12:47 AM
#2
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Each year when I put my 911 to sleep for the winter, I take the battery inside, put it on some wood in the basement, and hook up an old 4 amp charger (have had the charger for 25 years or so) to the battery at the start of each month, typically for the better part of a day.
08-23-2002, 01:20 AM
#3
I use a standard, run of the mill Craftsman 2/10/60 amp charger every two weeks on my 964. The car doesn't get driven enough to keep the battery completely topped up. I put the charger on the 2 amp setting and then let it run for the better part of a day until the full charge light comes on.
I do the exact same procedure as Bill does in the winter when my car goes into storage.
I do the exact same procedure as Bill does in the winter when my car goes into storage.
08-23-2002, 01:24 AM
#4
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Before buying a charger I would find out what is causing the battery to discharge.
First is the battery clean, terminals and the case itself.
Is the charging system working correctly.
Are there any parasitic draws IE: charging cell phone
flash light missbehaving charging system etc.
Check this stuff out and then if you need a charger look for a low amp trickle charger.
Chris
First is the battery clean, terminals and the case itself.
Is the charging system working correctly.
Are there any parasitic draws IE: charging cell phone
flash light missbehaving charging system etc.
Check this stuff out and then if you need a charger look for a low amp trickle charger.
Chris
08-23-2002, 09:24 PM
#5
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Not long ago I bought a battery charger which has the charging function just as any other, but also has an automatic load sensing function. Once ideal charging is achieved, the charger cycles on and off. According to the manuals, you can leave a battery hooked up indefinitely for tip-top condition. These are popular with motorcycles as well. Not sure if you can find it in the US, I bought it in the UK.
08-24-2002, 11:04 PM
#6
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Down here In Australia I bought a an intelligent charger which just keeps the battery topped up continously . I connect it everytime I'm going to leave the car for any length of time as the clock and the security system drain the battery .I'm sure these chargers are available in the US at a reasonable price . Porsche do one as an accessory and it plugs in through the cigarette lighter socket however it is not cheap --about US$85 . My local unit cost the equivalent of US$40.
keeping the battery charged with a standard charger is risky as if you forget to turn it off as you can/will cook the battery .
keeping the battery charged with a standard charger is risky as if you forget to turn it off as you can/will cook the battery .
08-25-2002, 01:15 AM
#7
Here in the states it's called a battery tender. I bought one from Harbor Freight; about $10. It charges until the battery's good, then it shuts/tapers off to prevent overcharging.
Sherwood Lee
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Sherwood Lee
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