Energizer A23 / MN21 12V Alkaline Battery — compact, high-voltage power ideal for remote controls, key fobs, garage door openers, and wireless security devices.

• Voltage: 12V miniature alkaline (A23 form factor)
• Size: ~28.5 mm length × ~10.3 mm diameter
• Typical capacity: ~50–55 mAh (low-drain devices)
• Use cases: key fobs, remotes, alarms, sensors
• Brand quality: Energizer performance & long shelf life