The listing, DURACELL 21/23 ALKALINE Watch / Electronic/ Keyless Entry Battery, 12 Volt Alkaline has ended.
Duracell Security 21/23 12V MN21?A23
Pack of two
12 Volt Alkaline batteries
Long lasting power in everything from watches to hand held games and calculators
Primarily used in garage door openers, car alarms and more
Dimensions: 3.5 x 1.8 x 0.5 inches ; 1.6 ounces
BRAND NEW BUT!!!!! SAYS Best before Mar 2010, may still working, may not! BID ACORDINGLY!