Let me tell you, these little button batteries are lifesavers! I've used them in everything from my kid's noisy storybooks to my vintage calculator collection. The blister packaging makes them super easy to store - no more loose batteries rolling around in drawers.

The installation is a breeze. They slide into devices like they were made for them (because they were!). I particularly love using them in my laser pointer during presentations - consistent power means no embarrassing mid-presentation fade-outs.

What surprised me most was the longevity. After six months in my bathroom scale, it's still going strong. The 3-year shelf life claim seems legit based on my experience.

My only minor gripe? The packaging is a bit tough to open if you don't have scissors handy. But hey, that probably means they're well-protected during shipping!

For the price, getting 20 reliable batteries is an absolute steal compared to buying them individually at big-box stores. These have become my go-to for all small electronics needs.