Car Remote Control Key Battery CP-VL20 3V 20to50mAh for Keyless Entry Systems

When your car remote control key starts to lose range or stops working altogether, a drained battery is often the cause. This CP-VL20 replacement battery provides a straightforward fix, delivering the 3V nominal voltage needed to restore reliable key fob function. With a nominal capacity range of 20 to 50mAh, it is engineered to support the everyday demands of locking, unlocking, and remote starting. Designed for direct compatibility with the CPVL20 specification, this single battery unit makes swapping out the old cell a simple task, getting you back on the road without unnecessary hassle.

Features and Construction

This battery is purpose-built for car remote key fobs, focusing on stable power output and a standardised form factor that fits many common vehicle models. The core specifications are clearly defined to help you confirm compatibility with your existing remote.

Nominal Voltage and Capacity

Operating at a nominal voltage of 3V, this battery ensures consistent performance for keyless entry systems. The nominal capacity is rated between 20 and 50mAh, providing enough energy for typical daily use, such as locking and unlocking doors and activating the boot release. Always check your original battery's voltage and capacity markings to ensure a match.

Standard CP-VL20 Form Factor

The battery conforms to the CP-VL20 (also known as CPVL20) specification, a widely used size for automotive remote key fobs. This standardised design means it fits snugly into the battery compartment of compatible remotes, ensuring good contact with the terminal clips.

Single Unit Packaging

Supplied as a single battery, this product is intended for one-for-one replacement in a single remote control key. There are no additional cells or adapters included, keeping the replacement process straightforward.

Uses and Placement

This battery is specifically designed for use within a car's remote control key fob. Its primary function is to power the internal transmitter that communicates with your vehicle's receiver module.

Vehicle Keyless Entry Systems

The battery provides the necessary electrical power for keyless entry functions, including locking and unlocking doors from a distance. A fresh battery ensures that the remote signal remains strong enough to reach the vehicle, even from several metres away.

Everyday Driving Convenience

Beyond basic locking, this power source supports other remote features such as boot release and, in some vehicles, remote engine start. Maintaining a good battery avoids the inconvenience of having to use the physical key blade to access the car.

Emergency Backup Power

In situations where the key fob battery has already failed, installing this replacement can restore full remote functionality. It acts as a simple, low-cost fix before considering more complex repairs or replacements of the key fob unit itself.

Benefits and Buying Value

Choosing the correct specification battery for your key fob saves time and avoids compatibility issues. This CP-VL20 unit offers a practical, direct replacement solution.

Straightforward Replacement

Replacing the battery in most car key fobs is a simple DIY task that requires no special tools. By matching the CP-VL20 specification, this battery allows you to swap the old cell directly, restoring function within minutes.

Cost-Effective Maintenance

A remote key battery is a small, consumable component. Replacing it proactively when performance drops is far more affordable than dealing with a non-functional remote or requiring a replacement key from a dealership.

Compatibility Assurance

The clear specification marking (CP-VL20 / CPVL20) and stated voltage (3V) make it easy to verify compatibility by checking your existing battery. This reduces the risk of ordering the wrong type and ensures the replacement performs as intended.