This piece of kit is not going to change the world but it fits into the handy non-essentials category. Something that just helps with admin in the field.
Batteries are fine in their packaging, they won’t move around and they won’t accidentally cause a short-circuit, but what happens after you’ve opened the packaging?
These caddies hold your batteries secure and won’t get soggy and fall apart when they get the inevitable soaking.
Once a battery is discharged you can place it in the caddy upside down so you don’t lose track of which are unused and which are dead.
The ones I got glow in the dark, supposedly to help finding them in a dark pack at night – is that worth paying extra for? Not a chance! They only glow when they’ve stored energy from daylight, and daylight doesn’t penetrate into the depths of my go-bag.