Let me tell you why I always keep a stash of these copper-top warriors. Last week, my kid's favorite dinosaur toy 'died' during a crucial Jurassic Park reenactment. One battery swap later, and we had a very relieved 5-year-old and a T-Rex roaring back to life.

What surprised me most was finding these same batteries still working in our outdoor thermometer after 14 months - through Chicago winters and summers. Meanwhile, the 'bargain' batteries I tried lasted about as long as my New Year's resolutions.

The real test came during our camping trip. These powered our lanterns for three nights straight while my friend's off-brand batteries tapped out after one night. Nothing ruins s'mores time like fumbling in the dark!

Pro tip: Buy the 48-pack. Between TV remotes, gaming controllers, and various kid toys, you'll be shocked how quickly they disappear. Just don't let your spouse see the Amazon order - 'Why do we need 48 batteries?!' Trust me, you will.