Subaru 2000 Forester Owner's Manual page 163

D Use of an electric appliance in the accessory socket or dual
power socket for a long period of time while the engine is not
running can cause battery discharge.
D Before driving your vehicle, make sure that the plug and the
cord on your electrical appliance will not interfere with your shift-
ing gears and operating the accelerator and brake pedals. If they
do, do not use the electrical appliance while driving.
Electrical power (12V DC) from the battery is on tap at the socket when
the ignition switch is either in the "ACC" or "ON" position.
You can use an in-car use electrical appliance by connecting it to the
socket.
HS6000BA
Interior equipment
HS6001BA
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