Perfectly-sized placement without being too tight; easily find what you need from 60+ batteries stored in the unit. The convenient tester instantly shows how much strength is left so you know which batteries are still good. This battery case neatly holds the batteries snugly in place within the foam pre-cut slots and keeps the contact ends from contacting each other, you don’t need to worry about that this foam will deform, Great way to organize your batteries easy for you to find whatever battery you looking for quickly.