First off, let me say these Duracell batteries saved me from overpaying for my dog’s fence collar 'Power Cap' replacements. I used a hobby knife to crack open the old Power Caps, swapped in these bad boys, and snapped them back together (with a dab of super glue for good measure). Works like a charm—same voltage, same performance, way cheaper.

But here’s the catch: while they fit perfectly in my laser sight, they drained *fast*. Like, 'left unused for months and suddenly dead' fast. Not ideal for emergency gear where reliability is key. I wouldn’t trust these in a home-defense scenario—imagine fumbling with dead batteries during a break-in. Yikes.

On the upside, they’re legit for niche gadgets (shout-out to the Garmin pedal users confirming compatibility). The price? A tad steep for lithium batteries, but Duracell’s quality usually justifies it. Just don’t expect miracles in high-drain devices.