The conrad energy battery storage box has been designed to store up to 36 batteries at a time the box provides practical safe storage space for 18x aas 14x aaas and 4x 9v batteries whether at home or on the go you can have all your batteries ready and available and easy to find in the conrad energy box the box can even be attached to walls stored batteries are protected from dust and humidity by the boxs robust lid with spring fasteningthe built in battery tester allows you to monitor t