BiXPower Car Cigarette Lighter Female Socket to 5.5 x 2.5mm & 5.5 x 2.1mm Female Barrel Connector Adapter
This adapter one end is a  female socket connector like a car cigarette lighter socket in most vehicles. Another end is a 5.5mm x 2.5mm female  barrel connector adapter.  It also comes  with an extra connector tip that can converter the 5.5x2.5mm female jack on the adapter to a 5.5 x 2.1mm female jack barrel connectors.This adapter is for DC power, maximum current can up to 10A.Caution:This adapter cable is just a connector adapter, it does not have any electronic circuit inside to control electronic voltage/current/polarity. It only provides physical size and shape conversion.  Please make sure the power source output is set correctly for your device.