A lead acid cell including a positive plate or grid has been discovered involving Pb/Ca/Sn/Ag alloy. An interaction between tin and silver which leads to optimum tin and silver levels which are substantially different than those indicated in the prior art. The described optimum tin and silver levels...http://www.google.es/patents/US6117594?utm_source=gb-gplus-sharePatente US6117594 - Alloy for battery grids
