Alkaline batteries, no matter the advertised claims, are little more than an enhancement of 19th Century carbon-zinc technology. The biggest change in chemistry is an alteration to the chemical mix in the electrolyte that makes it more alkaline sony vgp-bps8 , sony pcg-r505 , sony pcg-v505 , sony pcg-z505 (what did you expect?). This change helps to increase storage density and shelf life of the cells. The construction (as opposed to chemistry) of alkaline cells differs significantly... read more