Stacked constructions for electrochemical batteries

A stacked battery has at least two cell segments arranged in a stack. Each cell segment may have a first electrode unit having a first active material electrode, a second electrode unit having a second active material electrode, and an electrolyte layer between the active material electrodes. The first electrode unit comprises: a first electrode substrate (6a); and a first active layer (4a) on a first side of the first electrode substrate, wherein the first active layer includes at least a first active portion (4a') on a first portion of the first side and a second active portion (4a'') on a second portion of the first side, wherein the first active portion of the first active layer extends to a first height (4ah') above the first side of the first electrode substrate, wherein the second active portion (4ah'') of the first active layer extends to a second height above the first side of the first electrode substrate, and wherein the first height is different than the second height.