Battery Doctor (TM) rotary dial disconnect switch. 300 amps continuous. Cranking amps: 700amps/10 seconds. Can be used with 1 or 2 batteries.
The Battery Doctor Mini Master Disconnect Switch is designed to be installed on the negative (-) battery lead to prevent the battery from draining to unsafe levels and to switch between multiple batteries. The master disconnect switch can also be used to prevent theft, tampering and unauthorized use of vehicles while not being used. The Mini Master Switch is rated at 300 amps at 12 volts continuous and 1000 amps for 5 seconds at 12 volts.