A portable multi-function charger for electronic devices comprises a body, a circuit section, an input end, an output end, an output cord and a battery connector. An example apparatus includes an image processing module to embed a real component of a spectral representation of the image data into a first set of video frames from the plurality of video frames and embed an imaginary component of the spectral representation of the image data into a second set of video frames from the plurality of video frames. When the validation value of the first object fails the first validation requirement, the server sends a response to the client that causes the client to send a second request to a second URL that is distinct from the first URL. The clip is advanced along the sheath until it pierces opposing sides of a vessel wall at a puncture site. A sequence for calculating an amount by which a head actuator is adjusted during recording and readout operations is changed based on an output from the acceleration sensors.