For all vehicles (exc. '86-up Chevy, GMC and Toyota) 90 amps Self-contained electrical system converts alternator or generator to safe, efficient charger Crossover switch to let you start engine from auxiliary battery when main battery is drained. Automatically charges auxiliary battery as you drive, never overcharges . Self-contained electrical system converts alternator or generator to safe, efficient charger . Automatically isolate both the auxiliary and vehicle batteries so the discharge of one does not drain the other's power. Handle alternators up to 90 amps. Rectifiers and heat sink allow maximum heat dissipation without mechanical attachment. Eliminate shorting problems. Solid state. For all 6- to 36-volt, negative-ground electrical systems. UL listed.
Price: $82.61
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