A23 / A27 Batteries

A23 and A27 batteries are small Alkaline batteries that are commonly used in a variety of small electronic devices such as garage door openers, wireless doorbells, remote controls, and security systems. 

A23 and A27 batteries are both Alkaline based, meaning they use an alkaline electrolyte to store energy. The difference between these two types lies in their size and capacity. Both batteries provide an excellent shelf life.

The A23 battery is a small 12 Volt battery that is shaped like a cylindrical button. It has a diameter of 10.3 mm and a length of 28.5 mm. A23 batteries are also known as 23A or MN21 batteries. 

A27 batteries are also known as 27A or MN27 batteries. The A27 is also a small Alkaline battery, with a voltage of 12 volts. It is shaped like a cylindrical button and has a diameter of 8 mm and a length of 28 mm.

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