Breakaway battery charger maintainer diode

Breakaway battery charger maintainer diode is an accelerated battery charging device for all 12v battery systems with a 4 Amp-hr minimum output. Designed to fit securely into the Breakaway Battery Cases. The temperature-compensated design provides continuous recharge with an automatic float mode feature to prevent overcharging. Returns trailer breakaway system batteries to their maximum potential. Features an automatic float mode to prevent overcharging

Ref: Bargman, 50-85-104

Complete breakaway assembly can be found here