Load this waterproof powerpack with 8 D cell batteries (purchase separately) to provide a simple source of backup power for items that operate on 12 volts, including your GPS, VHF and other low-draw accessories, such as fishfinders and fans.

• Has a built-in battery tester and one 12-volt outlet
• 3 3/4"W x 8 3/8"H x 3 1/2"D
• One year warranty