PKCELL9V Battery Carbon Zinc for Smoke Detectors 6F22 Battery,Ultra Long-Lasting

I bought these mainly for the smoke detectors I have around the house. For low-power stuff, they work just fine, no issues so far. They’re definitely more affordable than other name brands, which is great if you need a bunch at once.Just keep in mind these are zinc carbon, not alkaline or lithium, so they’re not meant for high-drain devices. I wouldn’t use them in anything that needs a ton of power or constant use.They came well packaged, none were leaking, and I appreciate that they’re made without toxic stuff like mercury or lead. Good deal for backup or light use, but probably not your go-to for heavy-duty gadgets.

This is a great buy for the price. I use these in my TENS Medical device and they last longer than a day if I use the device all day. They are individually wrapped and have 16 in each box. I purchased 2 boxes. They would be perfect for a smoke detector, but I live in a unit where these are changed for me.

These batteries don't last as long as the name brand batteries do. Inexpensive but you have to buy more often.

Opted to read hundreds of reviews before purchasing and I must say I have to agree with most of the reviews being positive

Love the price and 10 year self life! A lot of uses as always. Using in my smoke detecters.

I do not have any complaints about these batteries at the moment. I recently put one in my smoke detector at home, so we will see how long that lasts. Primarily bought for smoke detectors and ceiling fan remotes. 9 Volt batteries from name brand companies are getting pricey now, for some reason. I guess because not a lot of people need them. So I'm giving these a shot to see how well they do for the price and quantity.

I used these in my smoke detector and working good.

Only lasted 6 months in my smoke detectors!