A23 Magnesium Oxide Battery, 12-Volt
Energizer, A23, 12V. Alkaline A23 Battery delivers optimal power for keyless entry and garage door openers. 12-volt battery is specially designed for electronic applications that may require high rate pulses. It is mercury-free. Cell size is A23. Miniature battery with a metal jack and flat contact is a replacement for 1181A and A23BP, DL21, DL23, MN-21B, MN21 and V23GA.