Battery Daddy Smart is the ultimate battery storage system with its unique double-sided design that stores and organizes up to 150 batteries. With Battery Daddy Smart each battery is kept safe and secure in a customized slot. The clear easy view cover allows you to see all your batteries at once. The secure, heavy-duty latches make sure your batteries stay in place. The compact design and fold-away handle allow Battery Daddy Smart to fit in a cabinet, drawer or shelf. Best of all, Battery Daddy Smart comes with a built-in battery tester so you can quickly test the life of the batteries you have. Great for home, office, boat, RV, workshop and more.