AA Battery Holder

An AA battery holder will retain AA batteries and electrically connect them to contacts that are contained within a special housing. Virtually all forms of electrical devices powered on AA batteries have some form of AA battery holder in which to place the batteries. An AA battery holder can be constructed out of several different materials, but plastic casings are very popular today.

The AA battery holder is based on a so called battery drawer; the casing in which you put the batteries. This part of the AA battery holder will keep the batteries position and prevent them from moving around and become damaged or disconnected.

At the rear end of the AA battery holder, the battery will connect to the terminals. A cam surface inside the AA battery holder is in contact with the battery every time the battery drawer is closed. This surface will bias the battery against rear end wall of the battery drawer. This means that the battery is pushed against the terminal where it can connect electrically.

In an AA battery holder, the design will prevent battery terminals from being connected to anything but the appropriate electrical contact, even if the user places the batteries upside down.