Okay, so I've been using these Duracell Procell 9V batteries for a while now and here's my brutally honest take:

🔥 The Good: These things LAST. I use them in smoke detectors and haven't heard that annoying midnight chirp in ages. Plus they come with handy plastic caps - major bonus points!

⚡ The Performance: Did some nerdy testing (yes, I'm that person) and they perform nearly identical to the yellow ProCells. Way better internal resistance than regular copper tops.

⚠️ The Ugly: That crimp quality though... Not gonna lie, it looks like someone had a bad day at the battery factory. Makes me nervous about potential leaks.

📆 Shelf Life Drama: Got burned once with batteries that only had 6 months left on their 10-year shelf life claim. Now I check every expiration date like a hawk.

Final verdict? Solid performers if you can get fresh stock and don't mind playing Russian roulette with the crimps. Still better than most alternatives out there!