Abstract: A latching circuit breaker is provided that is small and switches with a small amount of current. A battery switch incorporating the circuit breaker mounts on a battery top and is easily added as an accessory to control all of a battery's power. A convenient battery protection device uses the battery switch and a control system to automatically control a battery, prevent overdischarge, and reserve starting power. A manually resetting battery protection device is also provided. The battery protection device is adaptable to be incorporated into the design of a battery resulting in a trouble free, long-life battery.