Secondary cells and batteries containing alkaline or other non-acid electrolytes – Secondary sealed cells and batteries for portable applications -- Part 1: Nickel-cadmium ( IEC 61951-1:2017) (english version)
Secondary cells and batteries containing alkaline or other non acid electrolytes – Secondary sealed cells and batteries for portable applications -- Part 2: Nickel-metal hydride ( IEC 61951-2:2017) (english version)