The Battery Organizer Storage Cases with Built In Battery Tester is a versatile and practical product that can store and organize various battery sizes, including AA, AAA, C, D, and 9V. The built-in battery tester allows users to easily check the remaining power of their batteries. The white storage case is designed by The Battery Organizer and has a model number of TBO6167. This product is an open box item, meaning it has been previously opened but is in like-new condition. See photos.