Lead-acid battery

A lead-acid storage battery comprising in combination:

• a casing member having perimeter walls and a bottom wall defining a cavity and a plurality of partition walls dividing the cavity into cell compartments;
• a battery cell received in each compartment comprising a stack of a plurality of horizontally disposed negative active plates each containing a plurality of tigs spaced along a first edge aligned in vertical registration with tigs on other negative active plates in said stack to form a set of columns, a plurality of positive active plates each having a plurality of tigs spaced along an edge opposed to said first edge and aligned with the tigs in the other positive plates in the stack to form a second set of columns, said positive active plates alternating with said negative active plates and said negative plates having a capacity greater than the capacity of the positive plates, and porous, liquid electrolyte-containing separator sheets disposed between each of said plates, said sheets having good wetability for the electrolyte, having a pore volume greater than the amount of electrolyte contained therein and said sheets retaining virtually all of the electrolyte except the amount contained in the plates;
• a plurality of vertical, positive bus bars interconnecting each column of positive tigs;
• a plurality of vertical, negative bus bars interconnecting each column of negative tigs;
• connector means joining a positive bus bar to the negative bus bar on the opposite side of a partition wall;
• a negative strap interconnecting the negative bus bars at one end cell;
• a positive strap interconnecting the positive bus bars at the other end cell;
• a positive terminal connected to said positive strap;
• a negative terminal connected to said negative strap;
• and
• a top sealingly received on said casing.