There is disclosed herein an apparatus for electromagnetic forming, joining or welding a workpiece, the apparatus including at least two multi-turn solenoid coils wound in a manner that cooperatively encircles the workpiece to be formed. The call agent routes outbound voice traffic from the participating RGs to the RCM, which mixes the traffic from the RGs participating in the conference call and directs the mixed voice traffic to the participating RGs. Other embodiments include switching battery chargers that modify the battery current based on sensed circuit conditions such as battery voltage or input current to the switching regulator. An attachment assembly is arranged for attachment of the light assembly to a carrying device. The depletable shield may be configured such that during a high drain bias the shield substantially depletes. The UI includes a first display panel for displaying more than one of the digital medical images and a point on each digital medical image located in associated regions for stitching pairs of the digital medical images together, and a second display panel for displaying a composite image comprising the stitched digital medical images.