The simplest to install and least expensive option is this master disconnect switch from Painless (PN 50710). It has a continuous rating of 175 amps and a surge rating of 1,000 amps and is sold ...

Cole Hersee's new 79520 Master Battery Disconnect Switch is ideal for all vehicle electrical systems, including heavy truck applications, ...

The 75920 Master Battery Disconnect Switch cuts off all battery power from a vehicle’s electrical system. The switch also provides an effective emergency power cutoff, protecting vehicles from ...

There’s considerable controversy over whether it’s best to hook up the master-shutoff (“kill”) switch to the battery’s positive or negative side.