It's a good quality semi-hard sided box that will hold a LOT of batteries as well as battery tester, chargers and various accessories and makes it easy to find the battery you need. Honestly it has a lot more capacity than I need and was larger than I anticipated. It is predominantly for AA battery storage as there are only 6 D slots and 8 C slots. Fortunately I already have my own battery tester since that was not included.
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