IEC 61056-1:1991 Portable lead-acid cells and batteries (valve-regulated types); part 1: general requirements, functional characteristics; methods of test
2012IEC 61056-1:2012 General purpose lead-acid batteries (valve-regulated types) - Part 1: General requirements, functional requirements, functional characteristics - Methods of test
2002IEC 61056-1:2002 General purpose lead-acid batteries (valve-regulated types) - Part 1: General requirements, functional characteristics; Methods of test
1991IEC 61056-1:1991 Portable lead-acid cells and batteries (valve-regulated types); part 1: general requirements, functional characteristics; methods of test