Porsche 911 CARRERA - 2003 Manual page 217

A.
Warning!
Hydrogen gas generated by the battery
could cause an explosion, resulting in
severe personal injuries.
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Charge battery in a well ventilated area.
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Never charge a frozen battery. It may explode
because of gas trapped in the ice. Allow a
frozen battery to thaw out first.
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If you get electrolyte, which is an acid, in your
eyes or on your skin, immediately rinse with
cold water for several minutes and call a doc-
tor.
Slow
battery charging
1. Pay attention to all warnings and follow in-
structions that come with your battery
charger.
2. When charging, ensure adequate ventilation.
3. Remove battery (see "Removing battery").
4. All vent caps should be open.
The fluid level should meet the indicator mark
in each cell.
5. Ensure that charger is switched off - danger
of short circuit!
6. Connect charger cables.
Charger cables must be connected
POSITIVE 1+) to POSITIVE 1+) and
NEGATIVE (-) to NEGATIVE
I-).
7. Switch on charger.
Normally, a battery should be charged at no
more than 10 percent of its rated capacity.
Rated capacity of the battery in your vehicle
is listed on the battery housing.
8. After charging, turn off charger and discon-
nect charger cables.
9. Tighten the vent caps and reinstall battery
(see "Installing battery").
Winter operation
During the winter months, battery capacity tends
to decrease as temperatures drop.
Additionally, more power is consumed while
starting, and the headlights, heater, rear window
defogger, etc., are used more frequently.
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Let your Porsche dealer test the battery's ca-
pacity before winter sets in.
Replacing battery
The service life of the battery is subject to nor-
mal wear; it depends graetly on care, climatic
conditions, and driving conditions (distances,
loads).
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Only use an original Porsche battery, with the
correct part number, as a replacement.
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Please observe the disposal instructions for
batteries.
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Practical Tips, Emergency Service 217