(JP10040896-A)      A sealed lead-acid battery includes a separator comprising a hydrophilic treated sheet manufactured from synthetic fibre, and a further separator comprising glass fibre. Also claimed are sealed lead-acid batteries including an electrode group comprising either (1) (a) an envelope type separator comprising a hydrophilic treated sheet made from synthetic fibre; (b) one of a positive and negative electrode surrounded by (a); (c) at least one separator of fine glass fibre outside (a); and (d) another of positive and negative electrode article (c); or (2) (a); (e) one of a positive and negative electrode located within (a); (f) a mat-type separator made from fine glass fibre double-backed to form a 'u' shape, or two pieces of the separator being in contact with the outer surface of (a); and (g) another of the positive and negative electrodes in contact with (f); or (3) (g) one of a positive and negative electrode having outer surfaces surrounded by first hydrophilic treated sheet made from synthetic fibre and second glass fibre sheet material which is either double-backed to form a 'u'-shape or two separate sheets; and (h) another of the positive and negative electrodes on both sides of second glass fibre sheet material; or (4) (i) a tubular separator made from the hydrophilic sheet; (j) two electrodes of equal polarity inside (i) so that the lower ends become adjacent; (k) two separators made from fine glass fibre each in contact with outside and inside surfaces of (i); and (l) an electrode opposite in polarity to the two electrodes having the two mat-type separators on both sides; or (5) (i); (j); and (l) at least one mat type separator made from glass fibre which is ia double-backed 'u'-shaped member or two mat type separators, the separator in contact with the outside and inside surfaces of (i); or (6) (i); (j) and (m) at least one separator made from glass fibre either 'u'-shaped, or two pieces of either the separator or the two electrodes in contact with the inside and outside of the mat-type separator.