Battery A23 12V battery designed primarily for use in small electronic devices such as keychain garage door openers and other remote controls. 

Technical specifications:

• Type: A23 / 23AE / MN21 / LRV08 / V23GA / GP23A
• Voltage: 12V
• Technology: Alkaline
• Dimensions: 10.22 × 28.5 mm
• Weight: 7.5 g
• Shelf life: 3 years
• Manufacturer: AGFAPHOTO
• Packaging: 1 pc