CPC H01M 10/12 (2013.01) [H01M 50/446 (2021.01); H01M 50/466 (2021.01)] | 10 Claims |
1. A battery separator for a lead acid battery such as a flat-plate battery comprising:
a ribbed porous sheet comprising a bottom edge and joined lateral edges that form a pocket or envelope having an outer surface and an inner surface;
wherein the bottom edge has one or more slits through the sheet that do not extend to the joined lateral edges.
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