NOVELTY - The rechargeable battery comprises a chassis including a lower fixation plate, and prismatic battery cells (110) located on the lower fixation plate. The lower fixation plate includes a flow channel positioned to collect condensate from the battery cells and move the collected condensate away from the battery cells. The flow channel is configured to drain the collected condensate off the chassis. The lower fixation plate further includes a substrate, additional drainage holes located at a periphery of the substrate, and a lattice of cell dividers on the substrate.    USE - The rechargeable battery such as a lithium-ion battery is useful in a system for passenger vehicles (all claimed) and mobile computing devices, where the vehicle includes an aircraft, an automobile, a truck, a bus, a train or a boat.    ADVANTAGE - The rechargeable battery has lightweight and high energy density.    DETAILED DESCRIPTION - The rechargeable battery comprises a chassis including a lower fixation plate, and prismatic battery cells (110) located on the lower fixation plate. The lower fixation plate includes a flow channel positioned to collect condensate from the battery cells and move the collected condensate away from the battery cells. The flow channel is configured to drain the collected condensate off the chassis. The lower fixation plate further includes a substrate, additional drainage holes located at a periphery of the substrate, and a lattice of cell dividers on the substrate. The flow channel includes drainage holes in the substrate. Each drainage hole is located beneath portions of the battery cells. The flow channel further includes grooves in the substrate. The battery cells are arranged in a grid. Each drainage hole is located beneath corners of four adjacent battery cells. The battery cells are located between cell dividers. The grooves extend between the drainage holes along the cell dividers, and are sloped to cause the collected condensate to flow to the drainage holes. Each battery cell is wrapped with a polyimide film. A side of each battery cell includes a rupture plate (150). The chassis further includes a frame having cutouts. The battery cells are oriented such that the rupture plates of the battery cells are coincident with the frame cutouts. The battery further comprises dielectric separators between opposing faces of the battery cells. The dielectric separators are made of a fiber composite.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a rechargeable battery cell.    Battery cell (110)    Positive electrodes (120)    Negative electrode (130)    Case (140)    Rupture plate. (150)