AGM battery
An AGM battery is an absorbent glass mat battery, a sealed lead-acid type built for the high electrical demand and start-stop systems of modern cars.
What it means
AGM stands for absorbent glass mat. It is still a lead-acid battery, but instead of the plates sitting in free liquid acid, the acid is held in a fine glass-fibre mat pressed tightly between the plates. The battery is sealed, so it does not need topping up and can be mounted in the boot or under a seat without venting acid. That construction gives an AGM battery a few real advantages: it can deliver and accept very high current, it copes far better with being repeatedly drained and recharged, and it holds up well to vibration. Those traits matter because modern cars, especially European ones, ask a great deal of the battery. Start-stop systems shut the engine at every junction and rely on the battery to restart it again and again, while a long list of electronics keeps drawing power. An AGM battery is built for that cycle. It is important to fit a battery of the type the car was designed for: putting a standard flooded battery where an AGM belongs usually shortens its life and can upset the charging system.
Why it matters in Singapore
Singapore's constant tropical heat is hard on every car battery, since high temperatures speed up the internal chemistry that wears a battery out, so batteries here often last fewer years than in cooler climates. Stop-start traffic also means a start-stop system is cycling the battery constantly. On many European cars an AGM battery is not optional, and a replacement usually has to be registered to the car's electronics so the charging system treats the new battery correctly.
How Revol Carz handles this
Revol Carz Garage tests battery health during servicing on BMW, Mercedes, Audi, and Volkswagen and fits the correct AGM battery type when a replacement is due. We register the new battery to the car with marque-level scan tools where the model requires it, so the charging system and start-stop function continue to work correctly.