Battery Springs

Battery springs, also known as contact springs, are used with batteries to maintain a consistent electrical connection between the battery's terminals and the device it powers. Battery springs are typically made of metal, such as steel, copper or brass, and are designed to exert a consistent force on the battery's terminals to ensure good electrical contact.

When a device is connected to a battery, the battery springs compress slightly, bringing the terminals into contact with the device's electrical contacts. This allows electrical current to flow from the battery to the device, powering it. As the battery discharges, the springs may relax slightly, maintaining good contact between the terminals and the device's contacts.

Battery springs are often found in devices that require a replaceable battery, such as flashlights, remote controls, and other small electronics. They are typically located inside the battery compartment and can be replaced if they wear out or become damaged.

It's important to note that there are various types of battery springs with different geometries and materials, each having specific characteristics that make them suitable for different types of batteries and devices.

Stock Battery Springs for Immediate Delivery

Lee Spring’s stock line of battery springs are conical springs that are perfect for prototyping and small run production, and large production runs. These economical and reliable battery contacts are ideal for molded cases with self-contained battery compartments. Lee Spring’s battery springs have been designed to adjust to varying battery lengths and provide low contact resistance and dependable, even connections. Each of the four battery contact configurations is designed to work with the four most popular battery sizes: AA, AAA, C and D. Stock battery springs are offered in a choice of two in-stock materials; nickel coated music wire or silver coated beryllium copper. If our stock product designs do not meet your requirements, we can provide custom designs for battery springs, fourslide part contacts or stampings.

Battery Spring Material Information

Nickel Coated Music Wire: Since most alkaline batteries have nickel plated containers, a nickel coating for the metal contacts is suitable. The use of similar material removes the possibility of galvanic corrosion and aids in wear resistance. Nickel will also tend to wipe and aid in breaking down the oxide that can form on the battery metal contact surface. In addition, a nickel coating will provide general corrosion resistance and is an excellent conductor of electricity.

Silver Coated Beryllium Copper: Beryllium Copper is among the hardest, strongest and most wear-resistant of copper alloys. The silver coating further enhances electrical and thermal conductivity. The electric conductivity is 65-70% that of copper; the strength and fatigue resistance are comparable to higher beryllium alloys. The light silver plating allows for easy soldering. Beryllium copper is corrosion resistant in various environments and is both non-magnetic and non-sparking.
Learn more about spring materials

Stock Battery Springs are available in a choice of four conical spring configurations:

• Interior Mount Battery Springs
• Exterior Mount Battery Springs
• Adjustable Mount Battery Springs
• Double Mount Battery Springs

Search stock battery springs

Custom Battery Springs Made to Your Specifications

Battery springs come in a variety of shapes, types, lengths, and materials. Lee Spring can assist you with technical design questions, material and finish selections and engineering support from prototyping through large scale production. Lee Spring can manufacture coil type battery springs and also flat strip contact battery springs. Simply request a custom battery spring quote today or contact a Lee Spring Engineer for design assistance or to answer any questions to help start your custom battery spring project. Lee Spring is ISO 2015:9001 certified, REACH and RoHS compliant and ITAR Registered.