Amazon Basics 4-Pack 9V Alkaline Batteries, 5-Year Shelf Life - for Smoke/CO Detector, Electronics & AudioThe Nordic Swan EcolabelThe Nordic Swan Ecolabel

Dateline: A Darkened Room, a Chirping Smoke Detector, Late Saturday Night. It is a sound from the seventh circle of hell. The sharp, insistent, high-pitched CHIRP of a dying smoke detector battery. It is the universe's way of telling you, at three in the morning, that you have failed to prepare. It is a moment that calls for a specific and increasingly rare tool: the humble, blocky, 9-volt battery.This strange, rectangular power source is a relic from another time, yet it persists, the stubborn, beating heart of our most critical and our most bizarre devices. It powers the smoke alarm that saves your life, and it powers the vintage fuzz pedal that makes your guitar sound like a dying woolly mammoth. You need to have them on hand. You need a stockpile.Enter the Amazon Basics 9V. This is not the high-priced, celebrity-endorsed battery you see advertised during the Super Bowl. This is the people's battery. The pragmatist's choice. A simple, no-nonsense power brick that delivers on the one thing that truly matters: incredible, undeniable value.Let's be honest. In a head-to-head, long-distance race, will it outlast its big-name competitors? Probably not. It might run out of steam a little sooner in a high-drain device. But that is missing the point entirely. The point is that for the price of two or three of the "premium" batteries, you can have a whole damn arsenal of these things sitting in your drawer. You are not buying a single marathon runner; you are buying a fresh team of sprinters, ready to be tagged in at a moment's notice.And they will be ready. This is the second, and most crucial, part of the bargain. These batteries don't die in the drawer. They don't leak a foul, corrosive bile all over your other junk. They hold their charge with a grim, respectable tenacity. They sit there, for years if need be, patiently waiting for the call to action. Whether it's for the life-saving chirp of the smoke detector or the soul-stirring crunch of a guitar pedal, they are ready to serve.For the sheer, overwhelming value proposition, these cannot be beat. They are reliable, they are affordable, and they allow you to maintain a healthy supply of a crucial power source without taking out a second mortgage. They are the perfect, five-star solution for the well-prepared and the perpetually paranoid. A solid, working-class hero in a world of overpriced superstars.

I keep these on hand for smoke detectors, carbon monoxide alarms, and the occasional old-school radio. They’re affordable, reliable, and come in frustration-free packaging—which I appreciate more than I used to. At my age, I’m not chasing fancy brands, I’m chasing peace of mind, and these batteries deliver.The 5-year shelf life is a big plus. I store a few in the kitchen drawer and a few in the emergency kit, and they’ve held up well. No leaks, no duds, and they fit snugly in every device I’ve tried. I’ve even used them in my grandson’s walkie-talkies and they lasted through a whole weekend of backyard adventures.If you’re looking for a solid backup for safety devices or everyday electronics, this 4-pack is a smart, budget-friendly choice. It’s one of those household staples that quietly does its job—and that’s exactly what I want.

Reliable Power for Everyday EssentialsThese Amazon Basics 9V alkaline batteries are about as straightforward and dependable as it gets. I picked up the 8-pack mainly for smoke detectors and a couple of handheld meters, and they’ve worked exactly as expected. The packaging is simple and easy to open, which is nice when you’re swapping out a bunch of batteries at once.Performance-wise, they have delivered steady, consistent power with no hiccups so far. The 5-year shelf life is also reassuring—I can store extras in a drawer and know they’ll still be good when I need them down the line. Price is another strong point; compared to name brands, these offer solid value without feeling “cheap.”Things to keep in mind: these are standard alkaline batteries, not rechargeable, so they’re best suited for devices that need long-lasting, occasional power (smoke alarms, clocks, remotes, toys). For high-drain or constantly used electronics, rechargeable options might be more cost-effective over time.Bottom line: Affordable, reliable, and long-lasting—exactly what I want from a bulk pack of 9V batteries. Perfect for keeping smoke detectors and essential devices ready without overpaying.

Dependable and affordably priced. Not sure if they last as long as the name brands …

These are great and the size is perfect. I look forward to seeing if they last long. It works just well. Overall this is an amazing purchase and for the price it’s very great.

This battery has done really well so far for me in the past few years. I have had it in my smoke detectors for quite sometime and have not had to change it much. They are still running pretty strong when I checked the power. I also checked the one I had in storage and it lost a little bit of charge I feel but it is still a good battery. The battery installs easily into my smoke detector and I have yet to find a need to replace them. I only replaced my other branded one with these. They have not had any issues as of yet. They all individually wrapped in plastic which is good for storage but a bit annoying to open them one at a time. Overall the battery has done really well with my smoke detector. They have lasted for a very long time in the detector and storage. I have had no issues with low power as of yet which is good. The down side the individual wrap is a bit annoying.

Used to use rynovak batteries then the price went up. Switch to Amazon batteries about a year ago and they work just as good. Haven’t had any leak yet either.