5 out of 5
Duracell MN21B2 Duracell 21/23 Alkaline Battery, 12V Long-Lasting Batteries, 2 Pack
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Product Description
Manufacturer Part Number: MN21B2
At Duracell, we provide trusted power to those who depend on us to keep their lives charged. Duracell Alkaline Batteries are crafted and infused with triple corrosion protection for battery power you can count on. Duracell Alkaline Batteries provide long lasting power to your specialty devices, such as car alarms, key fobs, and GPS systems. This double pack of high performance 12-volt cylindrical batteries will last in storage for up to 5 years, so you can be confident they will be ready when you need them. Duracell is the #1 trusted battery brand, and we're proud to offer you Duracell 12 Volt Alkaline 21/23 Batteries as part of Duracell's trusted lineup of batteries.
DO: Keep all batteries in a safe place away from children and pets, particularly the smaller-sized batteries.
DON'T: Remove the battery label, or attempt to take the battery apart, or dispose of it in a fire as this may lead to rupture and/or chemical burns.
DO: Store batteries, in their original packaging, in a dry place, and at normal room temperature until ready to use.
DON'T: Attempt to recharge non-rechargeable batteries. This can cause your batteries to overheat or leak.
DO: Use the correct size and type of battery specified by the manufacturer of your device.
DON'T: Carry batteries lose in your pocket or purse as they may create a safety risk. They can be shorted by contact with metal objects and may leak, overheat or rupture.
DO: Replace all used batteries in your device at the same time. Insert batteries properly, with the plus (+) and minus (-) terminals aligned correctly.
CAUTION: Some equipment using more than three batteries may appear to work properly even if one battery is inserted incorrectly.
DON'T: mix old and new batteries, batteries of different brands, or batteries of different types (for example heavy-duty zinc chloride batteries and alkaline batteries) in the same device as this may cause the batteries to leak.
DO: Where possible, recycle your batteries where communities offer recycling or collection programs. You can contact your local government for information about the disposal options in your area. As part of our commitment to preserving the environment, we use only nontoxic inks in our packaging and the card portion of our package contains recycled material.
Features: WATCH/CALCULATOR, BATTERIES, ELECTRICAL FIXTURES/SUPPLIES
Brand: Duracell
Assembled Product Weight: 0.05 oz
Manufacturer Part Number: 5001878
Assembled Product Dimensions (L x W x H): 2.00 x 0.25 x 3.50 Inches
At Duracell, we provide trusted power to those who depend on us to keep their lives charged. Duracell Alkaline Batteries are crafted and infused with triple corrosion protection for battery power you can count on. Duracell Alkaline Batteries provide long lasting power to your specialty devices, such as car alarms, key fobs, and GPS systems. This double pack of high performance 12-volt cylindrical batteries will last in storage for up to 5 years, so you can be confident they will be ready when you need them. Duracell is the #1 trusted battery brand, and we're proud to offer you Duracell 12 Volt Alkaline 21/23 Batteries as part of Duracell's trusted lineup of batteries.
Duracell 12V Alkaline Battery 21/23, 2 Count, Long-Lasting Batteries
- #1 trusted brand of pharmacists and medical professionals
- Recommended for key fobs, home security systems, GPS trackers, car alarms, key-less entry, garage door openers, and in toys & electronic games
- Double pack of 21/23 Alkaline Batteries
- Equivalent to Duracell A23, MN21, 23AF, 23AE, and V23GA batteries
- Guaranteed for 5 years in storage
- Alkaline Batteries plus extra advanced Power Preserve technology
- Voltage: 12 Volts
Battery Care and Use:
Duracell batteries are a reliable and important source of daily portable power. To ensure you get the most from your Duracell batteries, follow these general 'DO' and 'DON'T' tips for proper battery use and storage:DO: Keep all batteries in a safe place away from children and pets, particularly the smaller-sized batteries.
DON'T: Remove the battery label, or attempt to take the battery apart, or dispose of it in a fire as this may lead to rupture and/or chemical burns.
DO: Store batteries, in their original packaging, in a dry place, and at normal room temperature until ready to use.
DON'T: Attempt to recharge non-rechargeable batteries. This can cause your batteries to overheat or leak.
DO: Use the correct size and type of battery specified by the manufacturer of your device.
DON'T: Carry batteries lose in your pocket or purse as they may create a safety risk. They can be shorted by contact with metal objects and may leak, overheat or rupture.
DO: Replace all used batteries in your device at the same time. Insert batteries properly, with the plus (+) and minus (-) terminals aligned correctly.
CAUTION: Some equipment using more than three batteries may appear to work properly even if one battery is inserted incorrectly.
DON'T: mix old and new batteries, batteries of different brands, or batteries of different types (for example heavy-duty zinc chloride batteries and alkaline batteries) in the same device as this may cause the batteries to leak.
DO: Where possible, recycle your batteries where communities offer recycling or collection programs. You can contact your local government for information about the disposal options in your area. As part of our commitment to preserving the environment, we use only nontoxic inks in our packaging and the card portion of our package contains recycled material.
Features: WATCH/CALCULATOR, BATTERIES, ELECTRICAL FIXTURES/SUPPLIES
Brand: Duracell
Assembled Product Weight: 0.05 oz
Manufacturer Part Number: 5001878
Assembled Product Dimensions (L x W x H): 2.00 x 0.25 x 3.50 Inches
Attention CA Residents: Prop 65 Warning
WARNING:
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.
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Our staff are available to answer any questions you may have about this item
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Customer Reviews
By James S. Sobek
Date: December 14, 2025
The battery was exactly the one I needed for my ceiling fan. Arrived on time and worked perfectly.
Rating: 
[5 of 5 Stars!]
[5 of 5 Stars!]
By Mizzy Dee
Date: December 02, 2025
perfect batteries for my ceiling fan
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By RENE D TRISTAN
Date: December 02, 2025
Good
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Justtroop
Date: October 19, 2025
Just what was needed
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Len
Date: October 03, 2025
Good Batteries good price! Delivered quickly and packaged well! They fit perfectly for my use!
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
By Master86
Date: August 03, 2025
Great Product and Service, as advertised
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]