As someone who used to dump all my batteries into a junk drawer, this organizer is a revelation. No more digging through a tangled mess of loose batteries—now everything has its own labeled spot. The first time I opened it, I actually laughed at how satisfying it was to slot each battery into its perfect little compartment.

The double-sided design is genius. I keep common AA and AAA batteries on the front for quick access, while the back holds my specialty batteries like CR123s and 18650s. The plastic slots feel sturdy—none of that flimsy foam that tears after a few uses. I did drop it once (oops) and was relieved when the latches held tight and nothing spilled out.

That built-in tester? Lifesaver. Last week when my thermostat died, I could instantly check if it was really the battery's fault (it was). My only gripe? Wish it had more button battery slots—I ended up using the extra sponge compartments for my CR2032 watch batteries.

After six months of use, it still looks brand new despite being hauled around in my toolbag. For anyone tired of playing battery roulette, this $20 box is worth every penny. It's not just storage—it's peace of mind knowing exactly which batteries you have (and which ones you actually need to buy).