Duracell CopperTop MN21/23 Alkaline Battery 4-Pack: Reliable 12-volt power for key fobs, alarms and small electronics

Trusted CopperTop performance when it counts

Product Overview:

You hate surprises from dead remotes, and this one keeps them away. Duracell CopperTop MN21/23 delivers steady twelve-volt power for alarms and key fobs. It replaces A23, MN21, 23AF, 23AE and V23GA sizes so you swap in without hunting for odd batteries. Each pack contains four batteries, and cartons ship thirty-six for workshops or large households. Use them in car alarms, keyfobs, GPS trackers, child locators and garage door openers. Alkaline chemistry gives predictable life and the copper-topped finish makes them easy to spot. Picture your remote clicking reliably, your alarm armed, and that small peace that follows.

Key Features:

• Alkaline Chemistry: Reliable energy that lasts through weeks of intermittent use, so your fob works when you need it.
• Twelve-Volt Output: Consistent voltage delivers clean signals and steady clicks, you'll hear the garage door respond immediately.
• Broad Compatibility: Works as A23, 23AF, V23GA equivalents, so replacements are painless and you avoid guesswork.
• Pack Size: Four batteries per pack keep a spare on hand, and cartons of thirty-six suit teams or tasks.
• Visible Copper Top: The copper-topped finish makes orientation obvious, so you pop them in fast and with less fumbling.

Quick Specs:

• Brand: Duracell
• Manufacturer: Duracell Inc.
• Item#: DUR-MN21B4CT
• Series: CopperTop
• Color: Black, Gold
• Format/Type: Battery
• Quantity/Pack: 4/Pack
• Compatibility/Use: Car Alarm, Motion Detector, Garage Door Opener, Door Lock, Security Device, Keyfob Transmitter, GPS Device, Remote Control, Child Locator
• Country of Origin: China

Feel the small relief when remotes and alarms behave, see the copper top glint, hear the garage click, and order a 4-pack to keep peace of mind, want me to set one aside?