NOVELTY - The system has 1 coolant transport means causing the coolant to enter the coolant inlet of the case, to flow through the coolant flow channels and to exit the coolant outlet. The width of the coolant flow channels optimally sized to allow for maximum heat transfer, through convective, conductive and radiative heat transfer mechanisms, directly from the batteries to the coolant. DETAILED DESCRIPTION - A fluid cooled battery-pack system comprises (i) a battery-pack case including 1 coolant inlet and 1 coolant outlet; (ii) a number of battery modules disposed within and arranged in a matrix configuration within the case; and (iii) 1 coolant transport means causing the coolant to enter the coolant inlet of the case, to flow through the coolant flow channels and to exit the coolant outlet. The battery modules consist of a number of individual batteries bundled together. The matrix configuration allows for coolant flow directly across 1 surface of the bundled batteries of each of the battery modules. The modules are positioned within the case and from other battery modules disposed within the case to form coolant flow channels along 1 surface of the bundled batteries. The width of the coolant flow channels optimally sized to allow for maximum heat transfer, through convective, conductive and radiative heat transfer mechanisms, directly from the batteries to the coolant.    USE -   Used as rechargeable prismatic metal hydride battery for industrial and commercial applications such as fork lifts, golf carts, uninterruptable power supplies, and electric vehicles.    ADVANTAGE -   The battery design is improved in mechanical and thermal properties, battery module design and battery pack design. The system is a lightweight, simple, inexpensive, and combines the structural support of the batteries, modules and packs with an air-cooled thermal management system. DESCRIPTION OF DRAWING(S) - Figure 2 is a depiction of an exploded, cross-sectional view of the mechanically improved rechargeable battery, specifically illustrating how many of the battery components interact when assembled. (1) Battery Case; (3) Case Top; (4) Electrode; (5) Electrode; (7) Battery Terminal; (8) Battery Terminal; (9) Battery Case Can; (10) Seal; (27) Electrical Collector Tabs; (29) Comb.