Duracell Coppertop 9V Battery, 4 Count Pack, 9-Volt Battery with Long-lasting Power, All-Purpose Alkaline 9V Battery for Household and Office Devices

Always reliable batteries and product of my choice. I keep large supply on hand for my own use and in emergency for the neighbors.

Good battery, good value for the money, nice size.

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.

Does the job that is needed and lasts a fairly long time.

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!

The few that I tried have worked perfectly. Won’t know the final answer for years.

Can't Go Wrong with Duracell. Use exclusively for all my gadgets. You get what you pay for - costs more - best battery.

Like these were purchased from the Duracell Store, I also order batteries from the Energizer Store & have been extremely pleased with the products.The only difference (other than price) in getting from somewhere else is that the manufacture date is a bit older on these. However, the battery & shelf life is at least 5 years so it's not an issue for me as I go through batteries prettyquickly, especially AA & AAA sizes. The manufacture date on these 9Vs is 2021 which is actually the closest to current year that I've ever gotten...only two years old. They are guaranteed for five years so they're fine. I don't use as many 9Vs which is why I only ordered a 4 pack.So basically I always order batteries from either the Energizer Store or the Duracell Store depending on who's got the lowest price at the time. I plan on continuing to do this as it's so much more economical than buying at a store or even purchasing through other sellers on Amazon.Would highly recommend these batteries & their seller.