NOVELTY - The commercially viable battery separator, is claimed. The battery separator has multiple separator properties optimized simultaneously, negative cross ribs, a low acid leachable total organic carbon of less than 150, a backweb (mils), a basis weight (less than 150 gsm), a stiffness (greater than 20 mN), a backweb thickness of 125-250 microns, a puncture Resistance of greater than 10 N, an oxidation Resistance of 50 % in original cross-machine direction elongation (RTM: Perox) at 40 hours, and an electrical resistance of less than ohms-in2.    USE - The commercially viable battery separator is useful in a lead acid battery such as flooded lead acid batteries, deep cycle lead acid batteries and industrial lead acid batteries of a vehicle (all claimed)such as a micro-hybrid vehicle such as power electric fork trucks, golf carts and cars and for capacitors, accumulators, gel batteries, polymer batteries, battery/capacitor, electrochemical cells, porous membranes, porous films, porous laminates, and/or coated membranes, where: the separators include polyolefin separators, polyethylene separators, enhanced flooded lead acid battery separators, idle stop and start (ISS) or micro-hybrid battery separators, ISS flooded lead acid battery separators, ISS enhanced flooded lead acid battery separators, and lead acid battery separators; and the battery includes an enhanced flooded lead acid battery, a valve-regulated lead-acid (VRLA) battery, a low-maintenance lead-acid rechargeable battery, an absorbed glass mat (AGM) battery, a VRLA AGM battery, a gel battery, a VRLA gel battery, a sealed lead-acid battery, an acid-starved design battery, a recombinant battery, ISS batteries, a starting lighting and ignition battery and micro-hybrid batteries.    ADVANTAGE - The commercially viable battery separator exhibits unique and/or complex performance, high oxidation resistance, less electrical resistance and increased puncture resistance and rigidity, and minimizes an amount of gas entrapment, grid and lug corrosion and acid stratification of the battery thus enhancing lifespan, efficiency, yield, power delivery and charge acceptance of the battery.    DETAILED DESCRIPTION - The commercially viable battery separator, is claimed. The battery separator has multiple separator properties optimized simultaneously, negative cross ribs, a low acid leachable total organic carbon of less than 150, a backweb (mils), a basis weight (less than 150 gsm), a stiffness (greater than 20 mN), a backweb thickness of 125-250 microns, a puncture Resistance of greater than 10 N, an oxidation Resistance of 50 % in original cross-machine direction elongation Perox(RTM: hydrogen peroxide) at 40 hours, an electrical resistance of less than ohms-in2, and a water loss with antimony alloy (less than 1.5 g/Ah) and with non antimony alloy of (less than 0.8 g/Ah).    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a separator.