What are the differences between AGM sealed lead batteries and Gel sealed lead batteries?
Both kinds of batteries are sealed, valve regulated types allowing them to be used in any position. The difference lies in the way the electrolyte is immobilized. In case of an absorbed electrolyte type (AGM), the newer of the two technologies, the electrolyte is absorbed by the glass fiber separator who acts like a sponge. In a gel-type battery the liquid electrolyte turns into a gel right after the battery is filled. Gel batteries use a different type of separators which are not absorbent. The internal design is otherwise similar.
