Abstract: A battery charger system suited for use in a sterilized environment such as an operating room includes a sterilizable battery-containing pack adapted for connection to a non-sterilized battery charger through a sterilizable tray-interface. The tray-interface includes connecting structure on an upper side for mechanical and electrical connection to at least one battery pack and additional connecting structure on a lower side for mechanical and electrical connection to the charger. The upper side and lower side electrical connections are inter-connected to effect electrical coupling between the sterilized battery and the non-sterilized charger so that the battery may be charged, discharged, or tested. A sterilizable drape is adapted to be constrained between the tray-interface and the charger to isolate the charger from the sterilized environment.

Abstract: A collapsible cordless electric hair curling appliance includes a hollow handle adapted for grasping by a user. A heating wand is extensibly slidably retained in the hollow portion of the handle. An improved positive temperature coefficient heating element assembly is positioned inside the wand. An electric plug assembly is also slidably mounted in the hollow portion of the handle. The plug is mounted so as to extend from the handle for connection with a conventional electric socket only when the wand is substantially fully inserted into the hollow handle. The novel plug assembly eliminates the need for a conventional electric cord and is also rotatably mounted in the handle to provide added convenience for plugging the appliance into a conventional electric socket. For storage, both the wand and plug assembly may be enclosed within the handle.