2004 Jeep Liberty Owner's Manual - Page 134

134 UNDERSTANDING THE FEATURES OF YOUR VEHICLE The rear power outlet is a direct feed from the battery so it receives power whether the ignition is in the ON or OFF position. All accessories connected to this outlet should be removed or turned off when the vehicle is not in use. 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 sufficiently 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 accessories still plugged in), the vehicle must be driven a sufficient length of time to allow the alternator to recharge the vehicle's battery.