Easy snap Woodstock rebuilt battery packs

[Chr Yoko]

Great that you could replace some 19th century chemistry by more modern one 8-)
Also Cadmium is not very environment friendly.

A bit of history :

Pb-acid: 2V, ED 30-40 Wh/kg, 1859
Ni-Cd, 1.2V 40-60Wh/kg, 1899
Ni-metal Hydride,1,2V, 60-120Wh/kg ,1967
Li-ion, 3,7V, 150-270Wh/kg, 1970’s