Energizer 23A 12V Battery MN21 — 2 pack, for remote controls and small electronics

Energizer 23A 12V Battery MN21 — 2 pack provides two compact alkaline cells engineered for small electronics that require a stable 12V supply in the 23A / MN21 format. Each cylindrical battery is intended as a direct replacement for depleted batteries in devices such as remote controls, keyless entry fobs, alarm system remotes and other compact gadgets where space is limited and high voltage in a small package is needed.

Advantages

The batteries deliver a reliable 12V output from a compact form factor, offering consistent voltage for short to moderate duration use. Their alkaline chemistry provides shelf stability and predictable discharge characteristics, making them suitable for intermittent-use devices. Supplied as a two-pack, they allow simultaneous replacement of multi-cell devices or a spare for future use.

Suitable for

• TV and multimedia remote controls
• Car keyless entry and alarm remotes
• Garage door openers and small wireless transmitters
• Security system remotes and sensors requiring 23A format

Key specifications

• Chemistry: Alkaline
• Nominal voltage: 12 V
• Format: 23A / MN21 cylindrical cell
• Pack quantity: 2 cells
• Typical use: Short to moderate duration, intermittent loads

How to use

Confirm the device requires 23A / MN21 12V batteries before installation. Open the battery compartment according to the device manufacturer’s instructions, observe polarity markings and insert the battery with the correct orientation. Replace both batteries at the same time if the device uses multiple cells to ensure balanced performance. Dispose of exhausted alkaline batteries according to local regulations or recycling programs.

Usage recommendations

Store the batteries in a cool, dry place and avoid exposure to excessive heat or humidity. Remove batteries from devices that will not be used for extended periods to prevent leakage. For devices with critical or continuous operation requirements, consider checking battery status regularly and keeping spare cells available.