cheetah CH012 alarm backup batery The CH012 alarm system adds - on power module will backup your alarm system and the hood lock system when the supply to the alarm from the car battery is cut. It will ensure that the siren will continue to whirl. Without add – on –power module. The siren whirling will stop immediately. This module is a must for vehicles with high chassis. For example the multipurpose 4 wheel drive or the truck with the battery mounted outside. The thief can easily cut the battery wires without open the hoot or the doors. Once the battery wire is cut, the module will take over the supply power to the alarm system and it will also send a signal to trip the alarm system.