These are still common in toys, decorations, and lighted or blinking items. The introduction of polypropylene in the 1950s and miniature batteries by Eveready allowed for the use of small plastic battery holders. 1922 for an assembly with two spring arm clips, a small switch, and a lamp assembly on the end of connected wires. By the 1920s, battery holders used twin metal clips (like fuse holders) to hold the battery in place while making electrical contact. Some early 1900s battery holders were often no more than a cardboard box with copper contacts. 617592 dated March 1898 is for an early metal flashlight that accepted D batteries. In the late 1800s, patents were issued for consumer products like flashlights US patent no. ![]() Where the battery is expected to last over the life of the product, no holder is necessary, and a tab welded to the battery terminals can be directly soldered to a printed circuit board. ![]() External connections on battery holders are usually made by contacts with pins, surface mount feet, solder lugs, or wire leads. Coiled spring wire or flat tabs that press against the battery terminals are the two most common methods of making the electrical connection inside a holder. Battery holders may have a lid to retain and protect the batteries or may be sealed to prevent damage to circuitry and components from battery leakage. For wet cells, cables are often connected to the battery terminals, as is found in automobiles or emergency lighting equipment.Ī battery holder is either a plastic case with the shape of the housing moulded as a compartment or compartments that accepts a battery or batteries, or a separate plastic holder that is mounted with screws, eyelets, glue, double-sided tape, or other means. For dry cells, the holder must also make electrical contact with the battery terminals.
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