Provided is a wireless power receiver for powering or charging an electric or electronic device or battery or a mobile electronic system such as a vehicle or robot. The receiver may consist of or consist essentially of a receiver coil of a blade or thin solenoid shape/geometry that includes a larger surface in a first dimension and a smaller surface in a second and/or third dimension, which receives power inductively from a wireless charger. The charger may be a source of an alternating magnetic field to charge or power one or multiple wireless power receivers or devices having small surface areas or volumes. The receiver coil has the smaller surface facing a charging surface of the charger. The wireless charger may include a charger coil designed to provide a substantially uniform magnetic field over an area larger than 50% of the charger surface.