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→Design: add diagram
==Design==
==Design==
[[File:Battery diagram.jpg|thumbnail|300px|A traditional battery design]]
Batteries are generally composed of two electrodes (the anode and cathode), electrolyte, and a semi-permeable barrier. Traditionally, these batteries are pictured as a pair of discrete electrodes in a bath of acid. However, battery cells are almost always designed with the electrodes as a thin, flexible sheets. They are then rolled together with a separator in between, and then submerged in a comparatively small about of electrolyte.
Batteries are generally composed of two electrodes (the anode and cathode), electrolyte, and a semi-permeable barrier. Traditionally, these batteries are pictured as a pair of discrete electrodes in a bath of acid. However, battery cells are almost always designed with the electrodes as a thin, flexible sheets. They are then rolled together with a separator in between, and then submerged in a comparatively small about of electrolyte.