Battery Organizer(hold up to 72 Batteries) with Removable Battery Tester Organize up to 72 batteries (10 AAA, 26AA, 9 9v, 10 C, 8 D, 6 CR and 3 AG batteries). Designed to fit in drawers or cabinet. With included mounting screws, the organizer also can be mounted on wall. Can test battery strength with removable battery tester. Make sure the battery polarity is aligned properly with the appropriate port. Removable Battery Tester doesn't have battery inside, it's powered by the tested battery.