When it comes time to choose a battery for our vehicle or machine, we are faced with the question of which technology to prefer.

The main technologies found in batteries are conventional lead-acid, AGM, EFB and GEL. But what differences are there in terms of their technology?

Conventional lead-acid batteries are divided into open and closed types, and are the oldest type designed to fit a wide range of products. Closed-type batteries contain lead sulfate plates and sulfuric acid electrolyte, which is placed in the battery by us before it starts fully charging.

An open-type battery contains an electrolyte solution but does not have any lead plates, as a result of which it needs regular maintenance and replenishment of the liquids with deionized water.

AGM batteries, on the other hand, have a basic difference with simple conventional ones. The lead plates they contain have between them special separators made of glass wool, which absorb the solvent and there is no risk of leaks. They are suitable for boats, motorcycles and also for cars with start-stop, where we encounter high vibrations and sudden movements.

EFB batteries are widely used in start-stop vehicles, which however do not have a braking energy recovery system. It is a battery with thicker plates and an improved composition. The positive plates are wrapped in a special microfiber material that absorbs and holds liquid electrolyte and thus prevents strong rejection of the active substance and significantly slows down the sulfidation process.

Finally, GELs are very different from any other battery even in the materials of their plates. GEL batteries contain calcium plates and a silicone gel in which the electrolyte is located. Because of this difference, we have to be very careful how we charge gel batteries, as they need low voltages and a charger that is suitable for gel batteries. This way we will avoid the creation of voids in the silicone gel and the premature wear of the battery. They are also perfect for start-stop vehicles, boats and any machine that can accept gel batteries.