Duracell Coppertop 9V Battery, 4 Count (Pack of 1), Long-lasting All-Purpose Alkaline 9V Batteries for Household and Office Devices

Duracell is the best

Duracell are my favorite batteries. They work great and last long.

Great quality and the price is good

The Duracell Coppertop 9V battery is a must-have for devices that you need to trust, like smoke detectors, carbon monoxide alarms, and important electronic gadgets. I’ve used these for years, and they consistently deliver long-lasting, dependable performance.The batteries come with a long shelf life, so even if you store them for emergencies, they’re ready when you need them. I appreciate that Duracell has built-in leak protection to help prevent damage to devices over time.They might cost a little more than generic brands, but the peace of mind and reliability make them absolutely worth it. Highly recommended if you want to avoid constant battery changes or failures at critical moments!

These are long lasting and I always have a pack on hand for the yearly battery change in my smoke detectors. Sometimes I need these for other purposes like my Ebow and these have worked for years in it. They're also great for use in guitar pedals. The only problem there is that the battery can drain overnight very quickly even with the pedal off if you have patch cables plugged in on both ends.If you use these with guitar pedals then be sure to unplug your patch cables when you're done otherwise it'll drain the battery overnight even if the pedal is off.

They are good batteries, but regrettably they still do die eventually.

Met our needs. Tired of buying those economical foot long Costco battery packs. Would use a few of those, and then watch the rest age and eventually leak.

Batteries are fine....I got them to have on hand for when I needed them.