EP1555710-A1  DATABASE INSPEC [Online] THE INSTITUTION OF ELECTRICAL ENGINEERS, STEVENAGE, GB; RAO M L B: "Investigations of an alkaline electrolyte for Zn-PbO2 cells" XP002325538 Database accession no. 553457 -& Journal of the Electrochemical Society, vol. 120, no. 7, 1973, pages 855-857, XP009046653 ISSN: 0013-4651;  DATABASE INSPEC [Online] THE INSTITUTION OF ELECTRICAL ENGINEERS, STEVENAGE, GB; RAO M L B: &quot;Investigations of an alkaline electrolyte for Zn-PbO2 cells&quot; XP002325538 Database accession no. 553457 -&amp; Journal of the Electrochemical Society, vol. 120, no. 7, 1973, pages 855-857, XP009046653 ISSN: 0013-4651;  DATABASE INSPEC [Online] THE INSTITUTION OF ELECTRICAL ENGINEERS, STEVENAGE, GB; RAO M L B: &quot;Investigations of an alkaline electrolyte for Zn-PbO2 cells&quot; XP002325538 Database accession no. 553457 -0x26 Journal of the Electrochemical Society, vol. 120, no. 7, 1973, pages 855-857, XP009046653 ISSN: 0013-4651;  DATABASE WPI Section Ch, Week 197740 Derwent Publications Ltd., London, GB; Class L03, AN 1977-71980Y XP002325404 -& NL 7 602 840 A (LINDSTROEM AB OLLE) 20 September 1977 (1977-09-20);  DATABASE WPI Section Ch, Week 197740 Derwent Publications Ltd., London, GB; Class L03, AN 1977-71980Y XP002325404 -&amp; NL 7 602 840 A (LINDSTROEM AB OLLE) 20 September 1977 (1977-09-20);  DATABASE WPI Section Ch, Week 197740 Derwent Publications Ltd., London, GB; Class L03, AN 1977-71980Y XP002325404 -0x26 NL 7 602 840 A (LINDSTROEM AB OLLE) 20 September 1977 (1977-09-20);  DATABASE WPI Section Ch, Week 200407 Derwent Publications Ltd., London, GB; Class L03, AN 2004-063203 XP002325403 & CN 1 450 679 A (CHEN S) 22 October 2003 (2003-10-22);  DATABASE WPI Section Ch, Week 200407 Derwent Publications Ltd., London, GB; Class L03, AN 2004-063203 XP002325403 &amp; CN 1 450 679 A (CHEN S) 22 October 2003 (2003-10-22);  DATABASE WPI Section Ch, Week 200407 Derwent Publications Ltd., London, GB; Class L03, AN 2004-063203 XP002325403 0x26 CN 1 450 679 A (CHEN S) 22 October 2003 (2003-10-22)