There’s also a convenient storage slot for the battery tester in the middle of the box

Love this storage

The Ontel Battery Daddy, 180 Battery Organizer and Storage Case with Tester is a fantastic storage tool

It has a Battery Tester sits conveniently & visibly in the middle of this clear storage box, so you will never mix up brand new batteries with used one, it also helps you determine if your rechargeable batteries need to be recharged before you go out with your portable devices, eg

I recommend this for at-a-glance use and easy storage.

Solid material construction should last, and the included storage of a tester should make your life easier.