Appendices 131Using a Car Battery Charger (Optional)Car Battery Charger CBC-NB1 (sold separately) can be used to chargebattery packs from an automobile’s cigarette lighter socket.• Always ensure that the automobile’s engine is runningwhen you use the car battery charger. Use of it with theengine off may flatten the battery in some automobiles.Always unplug the car battery charger before turning offthe engine.• With the engine running, plug the carbattery cable into the cigarette lightersocket and the battery charger.• Insert the battery pack all the way intothe battery charger as shown.• The charge indicator will light red whilethe battery pack is charging. It willchange to green when the charge iscomplete.• After charging, unplug the car batterycable from the cigarette lighter socketand remove the battery pack.• The battery will stop charging whenever you turn theengine off, so be sure to unplug the car battery cable fromthe cigarette lighter socket.• Wait until the engine is running again to plug the carbattery cable into the cigarette lighter socket.• The car battery charger can only be used in a negativeground car. It cannot be used in a positive ground car.To the cigarettelighter socketCharge Indicator