Minn Kota 1820175 Trolling Motor / Accessory Power Center Battery Box Ideal for small boat, transom applications (boats that do not have battery compartments). Features easy access external battery terminals that allow trolling motor leads and charger leads to be connected without opening the box. Built-in battery meter displays current "state of charge." Includes two 12-volt accessory plugs. Fits group 24- and 27-size batteries.