Abstract: A set of interchangeable keying members for keying a body that is mountable on mounting rails having keying features of different sizes and shapes, wherein the members of the set may each comprise: a key body for being disposed in a recess of the body and having a keying feature that corresponds to the keying feature of the mounting rail for engaging the keying feature of the mounting rail when the body is mounted thereto. The size, or shape, or position, or a combination thereof of the keying feature of each of the keying members of the set of keying members may be different and correspond to a keying feature of a mounting rail.

Abstract: An electrical light or flashlight may comprise: a housing for receiving a battery; an electrical light source in the housing; an electrical switch including an electrically conductive flexible dome providing a switch contact; a controller for selectively energizing and de-energizing the electrical light source, wherein said controller is programmable responsive to closures or openings or both of the electrical switch, or to a time therebetween, or to continuous closure or opening thereof, or to a combination thereof, for operating the light source in predetermined operating states.

Abstract: An electronic adapter circuit for charging and/or recharging a battery of a first battery type utilizing a charging device for a battery of a second different battery type, may comprise: an electronic circuit for controlling the charging of the battery of the first battery type when the battery of the first type is charged by the battery charging device, wherein the electronic circuit has high conductivity when the battery of the first type provides electrical power to a load, and has a reduced conductivity for limiting charging of the battery of the first type when it is charged by the battery charging device. The electronic circuit may include a controllable conductivity device having high conductivity when the battery of the first type provides power to a load, and a battery charging control circuit for reducing the conductivity of the controllable conductivity device for limiting the charging of the battery.

Abstract: A method for making a flashlight housing comprises providing a blank of an electrically conductive material, impact extruding the blank of electrically conductive material to form an elongated hollow member that has an internal cavity open at a first end and that has a reduced inner diameter portion proximate a second end thereof, and coating the elongated hollow member with a coating material. The flashlight housing may have a tail cap, and may have O-rings for sealing at the rearward end of the tail cap, at the forward end of the housing, and/or at the interface between the housing and the tail cap.