Battery holder

For wet cells, cables are often connected to the battery terminals, as is found in automobiles or emergency lighting equipment.

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.

External connections on battery holders are usually made by contacts with pins, surface mount feet, solder lugs, or wire leads.

In the 1980s, the first circuit board mounting lithium coin or button cell battery holders appeared in the form of patent no.

CR2/3A, CR1/2AA, and CR123A batteries began in camera applications but expanded into new markets like alarm systems, hand held computers and keyfobs.

Human factors to be considered include ease of battery exchange, age range and physical condition of the intended user.

A flexible contact allows for slight expansion of the cell on discharge, as internal chemicals increase in volume.

In July 2010, Microsoft said it hoped to sell its InstaLoad polarity protection technology, which allows batteries to be inserted in either orientation and still operate properly.

[4] Prior methods to accomplish this were expensive or caused a passive energy drain on the battery, whereas this solution is purely mechanical and affordable to produce.