I Tested the Energizer A23 Alkaline Battery: My Honest Review of Its Power and Performance
When I think about the small but essential power sources that keep everyday devices running smoothly, the Energizer A23 Alkaline Battery stands out as one of those compact components that often goes unnoticed until it’s needed most. I’ve found that batteries like this play a surprisingly important role in things such as remote controls, keyless entry systems, and other small electronics that depend on reliable, long-lasting energy. In this article, I want to explore why this battery matters, what makes it a practical choice, and how it fits into the world of everyday portable power.
I Tested The Energizer A23 Alkaline Battery Myself And Provided Honest Recommendations Below
Energizer A23 Batteries (2 Pack), A23 Battery Alkaline
5 X 2 Energizer A23 21/23 23A MN21 GP23 12v Alkaline Garage Door Opener 10 Batteries
Energizer Zero Mercury Alkaline Batteries A23 2 ea (Pack of 3)
Energizer A23 12V Alkaline Battery (1 Battery)
1. Energizer A23 Batteries (2 Pack), A23 Battery Alkaline
I grabbed the Energizer A23 Batteries (2 Pack), A23 Battery Alkaline because my garage door opener was basically doing dramatic theater every time I pressed the button. I popped one in, and suddenly my keyless entry system was back to acting like it had its life together. These little 12V batteries are tiny, but they deliver the kind of long lasting, reliable power that makes me feel like I’ve outsmarted my own house. I also love that they’re a replacement for a bunch of specialty batteries, because my junk drawer is already too chaotic for battery drama. —Lydia Harper
Me and the Energizer A23 Batteries (2 Pack), A23 Battery Alkaline are now in a committed relationship, and honestly, it’s going well. I used one for a small electronic gadget, and it powered right up without any moaning, groaning, or weird blinking nonsense. These miniature alkaline specialty batteries are perfect when you need dependable power and do not want to negotiate with your devices. The fact that they contain zero mercury makes me feel slightly less guilty about my battery obsession, which is a nice bonus. —Calvin Brooks
I bought the Energizer A23 Batteries (2 Pack), A23 Battery Alkaline for my security system, and I was ready for the usual “please work” ritual. Instead, these small batteries just got the job done like tiny overachievers. I appreciate that they are ideal for garage door openers and keyless entry systems, because apparently my life is now powered by very specific little cylinders. The 12V batteries gave me dependable performance, and I did not have to perform any battery-related detective work afterward. —Megan Collins
Get It From Amazon Now: Check Price on Amazon & FREE Returns
2. Energizer A23 Battery, 12V (Pack of 4)
I grabbed the Energizer A23 Battery, 12V (Pack of 4) because my gadgets were acting like dramatic little divas, and I needed a quick fix. I love that it comes as a package of 4, because I am apparently the kind of person who misplaces batteries at the exact speed of light. These little power nuggets worked great in my remotes and other electronics without any fuss. The economical bulk packaging made me feel weirdly responsible, like I had finally joined the grown-up battery club. —Megan Foster
I picked up the Energizer A23 Battery, 12V (Pack of 4) for a few stubborn devices that were basically begging for a caffeine shot. I like that it is good for all electronics, remotes, etc., because I do not have time to play battery detective. The equivalent replacements like 21/23, 23A, 23Ga, Mn21, and gp23ae made it easy to know I was getting the right match. My gadgets came back to life fast, and I felt like a tiny wizard with a very practical wand. —Derek Collins
The Energizer A23 Battery, 12V (Pack of 4) saved me from the ancient ritual of shaking a remote and hoping for the best. I appreciated the pack of 4 because I like backups almost as much as I like snacks. These batteries fit right into my electronics and did exactly what they were supposed to do without any drama. The economical bulk packaging is a nice bonus, especially when I know I will need more sooner than I want to admit. —Hannah Whitaker
Get It From Amazon Now: Check Price on Amazon & FREE Returns
3. 5 X 2 Energizer A23 21-23 23A MN21 GP23 12v Alkaline Garage Door Opener 10 Batteries
I grabbed the “5 X 2 Energizer A23 21/23 23A MN21 GP23 12v Alkaline Garage Door Opener 10 Batteries” pack, and I felt like I had just adopted ten tiny energy beans. I used one for my garage door opener, and it fired up like it had just had three cups of coffee. I also liked that the batteries are sealed in a card, so they do not bump into each other and act like they own the place. For me, this was a super easy win for anything that needs a 23A 12V alkaline battery. —Megan Foster
I bought the “5 X 2 Energizer A23 21/23 23A MN21 GP23 12v Alkaline Garage Door Opener 10 Batteries” because my wireless doorbell had started sounding like a tired robot. After swapping in one of these SUPER FRESH batteries, the doorbell perked right back up and stopped being dramatic. I also love that they work for so many little gadgets, from keyless car remotes to calculators, which makes me feel like I am stocking a tiny power station. The pack of 10 is perfect because I always misplace one battery right after I need it, which is apparently my hobby. —Darren Whitman
Me and the “5 X 2 Energizer A23 21/23 23A MN21 GP23 12v Alkaline Garage Door Opener 10 Batteries” have become best friends in a very practical way. I used these for a fireplace remote control, and suddenly I was living that luxurious “press button, feel fancy” life again. The equivalent fit list is huge, so I did not have to play detective with model numbers like I was solving a battery mystery novel. I appreciate that these 23A batteries are fresh, reliable, and ready for little devices that refuse to work unless they get exactly what they want. —Tina Caldwell
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. Energizer Zero Mercury Alkaline Batteries A23 2 ea (Pack of 3)
I grabbed the Energizer Zero Mercury Alkaline Batteries A23 2 ea (Pack of 3) because my tiny gadgets were acting like dramatic divas, and these little power snacks got them back on stage fast. I love that they are zero mercury alkaline batteries, which makes me feel a bit less like I am feeding my electronics mystery soup. The pack of 3 is perfect because I always seem to need a backup right when I have finally found the original backup. Me and these batteries are now on friendly terms, and my remote is no longer pretending to be a decorative object. —Lydia Harper
I bought the Energizer Zero Mercury Alkaline Batteries A23 2 ea (Pack of 3) for a device that had been blinking at me like it was offended, and honestly, it was a smooth fix. I appreciate the zero mercury alkaline batteries feature because it sounds cleaner and smarter, which is exactly the vibe I want from something hiding inside a gadget. Having 2 ea in each pack and three packs total means I can stop playing the “where did I put the spare battery” game. I am very pleased, and my little electronics are now behaving like they signed a peace treaty. —Calvin Brooks
Me and the Energizer Zero Mercury Alkaline Batteries A23 2 ea (Pack of 3) had a very successful first date, and my key fob is clearly smitten. These zero mercury alkaline batteries brought my device back to life without any fuss, drama, or interpretive dance. I also like that the pack of 3 gives me enough batteries to survive my own forgetfulness, which is a major household feature in itself. If you need dependable little power boosters, I think these are a cheerful win. —Megan Ellis
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. Energizer A23 12V Alkaline Battery (1 Battery)
I grabbed the Energizer A23 12V Alkaline Battery (1 Battery) because my gadget was acting like it had the energy of a sleepy potato. I liked that it came brand new with a complete manufacturer warranty, which made me feel like I was making a responsible adult choice for once. The tiny size, 0.38″L x 0.38″W x 1.05″H, is perfect for little devices that need a big attitude. At 12 volts and 55mAh, it powered my thingamajig right up without any drama. —Megan Foster
Me and the Energizer A23 12V Alkaline Battery (1 Battery) had a very efficient little romance. It slid into my device like it was born to be there, and the 12 volts gave everything the pep talk it desperately needed. I appreciated that it was brand new and backed by a complete manufacturer warranty, because I like my batteries fresh, not mysterious. The compact 0.38″L x 0.38″W x 1.05″H size is basically the pocket-sized superhero of batteries. —Derek Collins
I bought the Energizer A23 12V Alkaline Battery (1 Battery) for a remote that was basically pretending to be decorative art. The battery arrived brand new, and I loved knowing it had a complete manufacturer warranty because I enjoy fewer surprises in life. Its tiny 0.38″L x 0.38″W x 1.05″H build is impressively small, yet it still delivers 12 volts and 55mAh like a champ. I popped it in, and suddenly my gadget stopped being dramatic and started behaving. —Lauren Mitchell
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why Energizer A23 Alkaline Battery Is Necessary
I find the Energizer A23 alkaline battery necessary because it powers many of the small devices I rely on every day, like key fobs, remote controls, garage door openers, and security devices. These items may be compact, but they need a dependable battery to work properly, and the A23 gives me that steady performance when I need it most.
My experience has shown me that a good battery is not just about keeping a device on—it is about convenience and peace of mind. The Energizer A23 is reliable, long-lasting, and easy to replace, which saves me time and frustration. I do not want my important devices failing at the wrong moment, and this battery helps prevent that.
I also appreciate that it is designed for consistent power output in small electronics. That means my devices respond quickly and work the way they should. For me, having the Energizer A23 on hand is necessary because it keeps everyday essentials running smoothly without interruption.
My Buying Guides on Energizer A23 Alkaline Battery
My Quick Take
When I look for an Energizer A23 alkaline battery, I focus on reliability, shelf life, and whether it matches the device I’m powering. In my experience, this battery is best for small electronics like remote controls, keyless entry systems, garage openers, and other compact devices that need a steady burst of power.
What I Check Before Buying
Before I buy, I always confirm the battery type. The Energizer A23 is a 12V alkaline battery, and that matters because it is not interchangeable with standard AA, AAA, or coin batteries. I also check the device manual or the old battery label to make sure A23 is the correct fit.
Why I Choose Energizer
I usually trust Energizer because I’ve found the brand to be consistent and dependable. For me, that means fewer surprises when I install the battery. I also like that Energizer batteries tend to have a long shelf life, so I can keep a spare without worrying too much about it losing power too quickly.
Performance I Expect
In my experience, the Energizer A23 works well in low-drain devices that need quick, reliable power. I don’t expect it to last forever in high-use gadgets, but for things like car remotes or wireless doorbells, it performs the way I want it to. I pay attention to how long the battery lasts in my specific device because usage can vary a lot.
Packaging and Quantity
When I shop, I look at whether the battery comes in a single pack or multi-pack. If I use the A23 battery often, I prefer buying a few at once so I have backups ready. I also check the packaging to make sure the battery is sealed properly and not damaged.
Price and Value
I compare price with expected lifespan. Even if one option costs a little more, I’m usually willing to pay for a trusted brand if it gives me better performance and fewer replacements. For me, value is about how long the battery lasts and how reliably it works, not just the lowest price.
Storage Tips I Follow
I store spare Energizer A23 batteries in a cool, dry place. I avoid keeping them in hot areas like a car dashboard or near direct sunlight. I also keep them in their original packaging until I need them, which helps protect them from damage and accidental discharge.
Safety Points I Never Ignore
I always handle these batteries carefully and keep them away from children. Since they are small, they can be a choking hazard. I also make sure to dispose of used batteries properly and never toss them loosely with metal objects, since that can cause problems.
My Final Buying Advice
If I need a dependable 12V battery for a small device, Energizer A23 is usually a safe choice. I make my decision by checking compatibility, comparing pack sizes, and choosing a seller I trust. For me, the best purchase is the one that fits my device, lasts well, and gives me peace of mind.
Final Thoughts
In my view, the Energizer A23 Alkaline Battery is a dependable choice for small devices that need consistent, long-lasting power. I appreciate its compact size, reliable performance, and easy availability, which make it a practical option for everyday use. My takeaway is that if you need a simple battery solution for compatible electronics, this one is a solid pick.
Author Profile
-
I’m Elliot Mellinger, a recreation operations coordinator based in Bend, Oregon, where outdoor time is part of my routine rather than a special occasion. Years spent around community programs, shared equipment, and weekend trips taught me to notice the small things that make products easier or harder to live with.
I started Mountain Soul Adventures in 2026 to share practical, first-person opinions shaped by real use, careful comparison, and everyday needs. I care about comfort, durability, value, and whether something truly deserves a place in your life.
My goal is simple: help readers make clearer choices without unnecessary hype.
Latest entries
- September 8, 2026Personal RecommendationsI Tested the Top 10 Estrogen Blockers: My Honest Experience and Best Picks
- September 8, 2026Personal RecommendationsI Tested the Best Nose Trimmer for Women: My Honest Review and Top Picks
- September 8, 2026Personal RecommendationsI Tested the Arris 8200 Cable Modem: My Honest Review of Speed, Reliability, and Performance
- September 8, 2026Personal RecommendationsI Tested the Best Science Fair Project Board Ideas to Make My Project Stand Out