battery assembly 100 are shown installed in respective charging positions the charging unit 40 includes a pair of jaws 46 which snugly grip the head 28 of the flashlight 20 the gripping action of the jaws 46 is adapted to securely hold the flashlight 20 and to allow the charging unit 40 be mounted in any desired orientation without the flashlight separating from the charging unit the gripping action of the jaws 46 further allows the charging unit 40 to be mounted upon surfaces subject to vibration such as occurs within an automobile or other vehicle the auxiliary battery charger 41 includes an upper contact portion 43 a longitudinal rib portion 45 and a lower stop portion 47 the longitudinal rib portion 45 extends along the longitudinal axis of the auxiliary battery charger 41 in parallel with the longitudinal axis of the battery assembly 100 and joins with the upper contact portion 43 and the lower stop portion 47 at respective ends thereof in fig2 the flashlight charging unit 40 and the auxiliary battery charger 41 are shown with the flashlight 20 and the auxiliary battery 100 removed within the upper contact portion 43 of the auxiliary battery charger 41 there.