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The 12V 23A (also known as A23, GP23A, MN21, or L1028) is a compact alkaline battery commonly used in Centurion Nova remote transmitters (1-button, 2-button, 3-button, and 4-button models) for gate motors, garage doors, and access control systems.

This small, high-voltage battery powers the remote’s code-hopping transmitter, providing reliable performance and long range (typically up to 100m in open air).

Key Features:

• Voltage: 12V
• Chemistry: Alkaline (non-rechargeable)
• Dimensions: Approximately 28mm (L) x 10mm (diameter)
• Weight: ~8g
• Long shelf life and stable output for consistent remote operation.
• Easy to replace – no tools required on most Nova remotes (C-shaped clip design allows quick access).

Common Applications:

• Centurion Nova series remotes (standard for D5 Evo, D10, Vector, Vantage, and other Centurion gate/garage systems).
• Compatible with many other brands like ET, D.A.C.E., Sherlotronics, and Gemini.

Signs of Low Battery:

• Reduced range
• Dim or no LED light when button pressed
• Remote stops working

Tip: Replace annually or when performance drops. Always use genuine or high-quality equivalents for best results.