The lamp is charging wireless every time it's attached to the docking station. There is a magnet part inside the lamp so it's very easy to attach the lamp to its dock. Thanks to the simplicity of the cylindrical joint with no connector, the head can rotate around it's axis.
Of course there is a micro-USB port, which becomes very handy when the lamp needs to be charged and you are farther from the dock. No matter. You can use any USB cable from your mobile phone.