GTIWUNG 4Pcs AA/AAA battery Storage Case Holder Box(10 Cell), Plastic for Batteries and Rechargeable + 12Pcs AAA to AA Adapter with Metal Contacts on Bottom

AAA to AA Adapter: convert the AAA battery to the standard AA battery size, the bottom of the adapter is not hollow, it’s sealed with the metal, it makes sure the good contact with the negative side. AAA battery can be converted to AA battery by the AAA to AA battery adapter, they play the functions on saving energy. Convenient and a perfect solution for both AAA and AA batteries. Keep your batteries organized and protected. The battery box made of sturdy plastic is perfect for storing and transporting batteries and batteries! The protective box can be flexibly used in the home, office, workshop, garage or as a photographic accessory! Several boxes can be plugged together! Package Includes: 4 x Battery Storage Cases（10 Cell）, batteries are not included; 12 x AAA to AA Adapter. Color: transparent.