Jeep 2007 Grand Cherokee Series Owner's Manual page 157

All accessories connected to this outlet should be re-
moved or turned off when the vehicle is not in use to
protect the battery against discharge.
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 157
CAUTION!
Electrical Outlet Use With Engine Off
• Many accessories that can be plugged in draw power
from the vehicle's battery, even when not in use (i.e.,
cellular phones, etc.). Eventually, if plugged in long
enough, the vehicle's battery will discharge suffi-
ciently to degrade battery life and/or prevent engine
starting.
•
Accessories that draw higher power (i.e., coolers,
vacuum cleaners, lights, etc.) will degrade the battery
even more quickly. Only use these intermittently and
with greater caution.
•
After the use of high power draw accessories, or long
periods of the vehicle not being started (with acces-
sories still plugged in), the vehicle must be driven a
sufficient length of time to allow the generator to
recharge the vehicle's battery.
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