Abstract: A battery assembly having through-the-wall connection assemblies for connecting the electrodes of a first polarity in a given battery compartment to the electrodes of a second polarity in an adjacent battery compartment through an aperture in the internal wall separating the compartments. Each through-the-wall connection assembly includes first and second button or disk shaped members. The first member has opposing first and second surfaces and the second member opposing third and fourth surfaces. The first surface of the first member and the third surface of the second member each have a projection extending outward of the respective surface. The second surface of the first member and the fourth surface of the second member each have a groove and the battery assembly further utilizes first and second elastic members situated in the grooves of the second and third surfaces.

Abstract: A battery assembly having a rechargeable battery and a separate battery charging unit formed from a battery charger which is affixed to a cover, the latter cover being locked to the rechargeable battery by a locking assembly. The rechargeable battery has an outer surface and positive and negative terminals extending from the outer surface and the cover is designed to cover a portion of the outer surface of the battery exclusive of the positive and negative terminals. The latter terminals are thus not obstructed by the charger and cover and are, accordingly, accessible for external connection to the battery by the user. Additionally, the locking assembly is unlockable once locked. The cover and charger are thus permanently affixed to the rechargeable battery. Terminal pieces are used in the battery assembly which are themselves secured to the battery assembly by securing members which maintain the terminal pieces secured to the battery when the pieces are disengaged from the positive and negative terminals.