This connector adapter has a regular USB type-A male plug on one end and a 5.5mm x 2.1mm male barrel plug the other end. This adapter is used to convert a regular USB type-A female socket to a 5.5mm x 2.1mm male barrel plug. Great for converting a regular USB type-A female socket on a USB power source to a 5.5mm x 2.1mm male barrel plug (see WARNING). See pictures for an illustration of this typical application. The 5.5mm x 2.1mm male barrel plug at one end of the connector adapter works with the 5.5mm x 2.1mm female barrel sockets found on our battery eliminator kit accessories such as our active dummy cell batteries, power extension cables, and power splitter cables. This connector adapter only supports power and does not support USB data transmission.

This connector adapter has a 5.5mm x 2.1mm female barrel socket on one end and a 3.5mm x 1.35mm male barrel plug on the other end. This adapter is used to convert a 5.5mm x 2.1mm male barrel plug to a 3.5mm x 1.35mm male barrel plug. Great for converting the typical 5.5mm x 2.1mm male barrel plug at the end of the power cable found on many AC to DC wall power adapters to a 3.5mm x 1.35mm male barrel plug for electronic devices that have this type of mini female barrel socket input used for powering or charging the device. See pictures for an illustration of this typical application. The 5.5mm x 2.1mm female barrel socket at one end of connector adapter works with the 5.5mm x 2.1mm male barrel plugs found on our battery eliminator kit accessories such as our power extension cables, power splitter cables and AC to DC wall power adapters.