If the connector on the cable fits your power jack but it is too loose, you may have a 5.5 x 2.1mm power jack. In this case, you need the 5.5 x 2.1mm adapter to change the 5.5 x 2.5mm barrel connector on the cable to 5.5 x 2.1mm connector. This 5.5 x 2.1mm adapter is optional and not included in standard package.
Cigarette lighter female connector to 5.5 x 2.5mm Male
connector power cable.
One end of this cable is a cigarette lighter female connector, and the other end is a 5.5 x 2.5mm male barrel connector.
5.5mm x 2.5mm barrel connector can be converted to a different sized connector with
optional connector tips CNT-C1 ~ CNT-C26
tip is optional, not included.