Electrifying! A device based on carbon nanotubes wrapped with poly(3-hexylthiophene) (and dispersed in poly(dimethylsiloxane)) sheets can effectively convert laser light into thermal energy and subsequently to electricity. The converter is flexible and extremely compact (see picture), and can be manipulated by using a laser that functions in the wavelength range that can be transmitted through living tissue. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.