Tired of running out of trolling motor battery power on the water? The All-In-Charge 12/24/36v Smart Box charges up to three 12-volt accessory batteries from your boat’s alternator. No confusing wiring configurations. Simply connect positive and negative connections to each battery. Charge while driving or sitting in idle.




  • Durable design with high quality 10 gauge wire and components.
  • All-In-Charge Smart Box technology reduces strain on your starting battery and alternator by engaging only after your starting battery is at 13 volts.
  • All-In-Charge Smart Box chargers charge the lowest charged battery first and one at a time, which reduces the chance of heat generation and charges multiple batteries more efficiently than other mobile 12-volt chargers.
  • Due to the safety features of All-In-Charge chargers, they will not harm alternators or void warrantes on motors or electronics.


What We Include:


Includes one 12/24/36v Smart Box.


Includes a 90 day money back guarantee and 3 year limited warranty.




Box: 8 1/4″ L x 4 1/2″ W x 2 ¼” H

Top box wires: 8ft

Bottom box wires: 37”

Total weight: 2.lbs 12 ounces

12/24/36v Smart Box DC-DC Charger