Single-use battery Energizer EN-639333

The Energizer EN-639333 is a single-use A27 (also called 27A) alkaline battery that delivers 12 V in a compact 28.2 mm × 8 mm metal cell. Weighing approximately 4.4 g and sold in a blister pack of two, this miniature battery is intended to provide dependable power for small electronic devices where a 12 V button-style cell is required.

Advantages

The A27 Energizer battery offers steady 12 V output in a very small form factor, compatible with a range of keyless entry systems, garage door openers and other remote controls. Its alkaline chemistry provides stable performance during typical single-use applications, and the compact size makes it easy to carry spares or store in a vehicle or toolbox.

Suitable for

• Keyless entry remotes
• Garage door openers
• Small remote controls and wireless sensors
• Other devices specified to use A27 / 27A batteries

Key specifications

• Brand: Energizer
• Model: EN-639333
• Cell size: A27 (27A)
• Chemistry: Alkaline
• Voltage: 12 V
• Dimensions: approx. 28.2 mm (height) × 8 mm (diameter)
• Weight: approx. 4.4 g per cell
• Quantity: 2 pcs per blister
• MPN / EAN: 7638900393330

How to use

Install the Energizer A27 battery into the battery compartment of your device, observing the correct polarity (+ and −). Ensure contacts in the device are clean and dry before insertion. Replace both batteries in multi-cell compartments at the same time if recommended by the device manufacturer. Dispose of used single‑use alkaline batteries according to local regulations.

Recommendations

Store batteries in a cool, dry place and avoid direct sunlight or excessive heat. Remove batteries from a device if it will not be used for an extended period to prevent leakage. Use Energizer A27 batteries in devices that explicitly list A27/27A compatibility to ensure safe and reliable operation.