The Mighty Max ML-24TMBX Smart Battery Box power station is designed for batteries fits 12V battery group size 24, 27 and 31. Designed to protect your battery and provide quick and easy access to hook up your trolling motors power cables to the Smart battery boxes screw top terminals. Our smart battery box is not only perfect for providing power to your motor but also keeping you connected with those on shore, our box is equipped with a Dual USB port to keep your phones charged as well as 12V DC power outlet. The lid of the box is equipped with an on/off switch to power up the box, as well as a voltmeter and a circuit breaker reset switch. Designed for adventure with extra safety measures in mind this box effectively collects battery acid, allows adequate ventilation, secures, and locks the lid to the base, and prevents accidental contact of underground battery terminals. The ML-24TMBX is the ultimate accessory for all your small boats, inflatable boats and trolling motors and RV’s.