Battery Daddy Smart Storage System 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! Holds 150 Batteries - 58 AAs, 68 AAAs, (4) 9 Volt, 8 Cs, 8 Ds, and 8 Button Cells. Battery Tester Included!