Customer Reviews for Duracell 21/23 Alkaline Battery, 2/Pack (MN21B2PK)
Item # : 306232
Model # : MN21B2PK
The Duracell 21/23 12V Alkaline battery is designed to provide reliable power to specialty devices like car alarms, key fobs, GPS trackers, remote controls, and other electronics.
- POWER FOR A WIDE RANGE OF DEVICES: The Duracell 21/23 12 Volt Alkaline battery is designed for use in a variety of compatible devices like car alarms, key fobs, GPS trackers, remote controls, and other electronics.
- LONG-LASTING POWER: Duracell high power 21/23 12V Alkaline batteries were developed to provide reliable performance for your specialty devices.
Price is $8.79
Unit of measure 2/Pack
30-min pickup
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121 reviews
Most helpful positive review
Posted Mar 27, 2026
Durability + Saves money too!
For any device, toy + MORE! This is your go to brand for long term use! I love this brand. I’ve tried other batteries. But with this brand I can at least have peace of mind that I will not have to keep switching on and off to get my tv remote + my children’s toys and so much more. I can place on time battery and not have to buy more for MONTHS! Basically a year.
VS
Most helpful critical review
Posted Oct 31, 2022
It was not expired. but would expire soon. 2nd battery will probably expire before it is needed.
It was not expired. but would expire soon. 2nd battery will probably expire before it is needed. I cannot recommend until I see how long it lasts. I will have to mark something.
AudreeR
Reviewed at:
influenster.com
Posted Mar 27, 2026
Durability + Saves money too!
For any device, toy + MORE! This is your go to brand for long term use! I love this brand. I’ve tried other batteries. But with this brand I can at least have peace of mind that I will not have to keep switching on and off to get my tv remote + my children’s toys and so much more. I can place on time battery and not have to buy more for MONTHS! Basically a year.
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ManouchecaR
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Posted Mar 14, 2026
Very good 👍
They offer long lasting power,quality, and reliable performance for all types of electronic device.
They work very well in remote contrls,toys,watchets,and other Electronics device.They are reliable.
They work very well in remote contrls,toys,watchets,and other Electronics device.They are reliable.
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PallaviS
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Posted Mar 14, 2026
High quality batteries
High quality batteries with a great reputation for reliability and long life. It’s my goto brand when I want and need dependability. They last forever in everything.
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SamK
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Posted Mar 10, 2026
Long lasting
One of the best long lasting battery i have ever used. This is so good and quality is just mind blowing. It doesn’t leak at all and it’s easy to dispose.
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jacobB
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Posted Mar 6, 2026
great batteries
they are very long lasting and drain very slowly! they are pretty light as well, and the packaging is easy to open and as a whole they are very easy to dispose of and get new ones
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PhungN
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Posted Mar 3, 2026
Dependable small alkaline battery with long consi
The Duracell MN21 Alkaline Battery delivers reliable long lasting power for small electronics like key fobs remote controls and security devices Its compact size fits easily into that require extra shelf life Duracell’s quality construction gives consistent performance you can count 23 on
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naazJ
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Posted Feb 18, 2026
Durable
One of the longest lasting battery brands out there, very reliable and come in huge packs depending on the store. Would recommend for power needs
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mallory R
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Posted Feb 4, 2026
Best battery brand out there
Best battery works very well and lasts for a long time. Very reliable and helps throwing onto any battery. Powered source made easy with easy activation does not leak.
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Yael R
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Posted Feb 4, 2026
Fab and reliable!
Work well and last long. Packaging is easy to open, they always work consistently, no issues with overheating or leakage. They are my go to battery brand!
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innam43_8533
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Posted Dec 18, 2025
This battery has reliability and long life in smal
This battery last significantly longer than cheaper brands and keep devices powered for months without issues. They are not the cheapest, but the quality and durability worths the price since its unusual size. It’s kind of hard to find them so make sure you’re ordering the correct type.
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felixr35_3152
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Posted Dec 8, 2025
Great option.
I only buy these for my remotes because the Reliability is unmatched; they always work when I need them. The Duration is excellent, and the Power is strong—a definite upgrade over cheaper batteries!
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bridgetted10_7252
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Posted Dec 4, 2025
Duracell batteries lasted for months in my TV remo
I used Duracell batteries in my TV remote that gets used daily, and they lasted much longer than the previous brand I had. The power stayed strong with no signs of fading or weak performance. I didn’t have to replace them for months, which was a huge plus. Overall, they were reliable, long-lasting, and worth the price.
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yanad45_9548
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Posted Nov 19, 2025
Battery life better than other brands
The only batteries that I use for many years. The battery life seems to last longer than other batteries. Power and packaging seems just like other brands.
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sharafiev_1300
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Posted Nov 3, 2025
Reliable, long-lasting battery power that’s worth
The Duracell MN21/23 Alkaline Battery delivers consistent performance and long-lasting durability. I’ve used it in small devices like remotes and key fobs, and it holds power for months without dropping off. The packaging is sturdy and easy to open, protecting the batteries well. It’s compatible with most of my devices and offers great value considering how long each on...
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thaon113_3822
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Posted Sep 29, 2025
Durability, value, performance, packaging, compati
Duracell is outstanding for their products, I used many brands before but nothing can beat their performance and they are so value able to me. Their competitive with other brands is absolutely big win. Also, their packaging is on another level, no leak and well sealed.
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ana-mariar70
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Posted Sep 24, 2025
The best
The product demonstrated excellent performance, providing sustained functionality for my children's toys over an extended period. Very well packaged
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chelseak5823
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Posted Sep 17, 2025
Durable
While these ones may be a little pricey they tend to always do the job! They always last longer than other battery brands I have used and always work to the best of the ability I need!
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erinh518
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Posted Sep 16, 2025
Great battry life
Great battry last gor so long had bought a 2 pack for my brothers controller he uses it for about 4 housrs every day thay lasted 6 months very impresed
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parfaitd
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Posted Sep 6, 2025
You never go wrong with Duracell!
Using a Duracell makes you forget about maintenance, long lasting performance, rigid packaging, works with all appliances. You never go wrong with Duracell!!
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danu4
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Posted Aug 24, 2025
Great battery
Great product that has powered all of my remotes. Would recommend for anything that requires the mn21/23 battery. The packaging is perfect for this single unit battery.
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