A new technology for grid production by electroforming is found to improve grid properties and thus, to increase cycle-life, save costs, and increase the ecological efficiency of lead-acid batteries beyond the corresponding features of competing designs. The particular aspects of the superior corrosion behaviour of the new grids are addressed with respect to the effects of chemical and anodic processes, microstructure, corrosion-induced creep and grid growth, and adherence of the positive active-mass. Along with each of these factors of influence, the prospects for improving battery behaviour and lowering cost is also discussed. The properties achievable by using electroformed grids are presented in terms of experimental results from a comparison with the properties of conventional grids, and by modelling and simulation. (c) 2004 Elsevier B.V. All rights reserved.