![]() Because of the absorbent glass mats, battery makers can literally squeeze in more lead plates. ![]() The fiberglass mats spread more of the electrolyte in contact with the ultra-thin lead plates - all while cushioning the battery against knocks, bumps and vibrations. What’s an AGM battery and what makes it so different from a regular flooded car battery?ĪGM means absorbed glass mat, and it means the battery acid inside is absorbed into fiberglass mats instead of sitting as a free-flowing liquid. As of 2022, more than 50 million vehicles on the road require an AGM battery. More than half of new vehicles sold after 2019 require an AGM battery because of their electrical power needs. AGM batteries are also quickly becoming one of the most common batteries on the road. AGM batteries are car batteries designed to deliver a lot of amps even when the engine is off. It takes a new generation of car batteries.Įnter the absorbed glass-mat (AGM) battery. The design hasn’t changed much since the lead-acid battery was invented in 1859, except for small tweaks and a durable, plastic case to protect the lead plates and contain the sulfuric acid and water.Ī battery design from the 1800s can’t fully support today’s vehicles. They used to fit the bill for cars because they can throw a lot of electricity into a starter in a short burst. That need is an incredible burden that a standard car battery can’t handle. Auto start stop engines that give you fuel efficiency better than 30-40 mpg by cutting the engine instead of letting it idle - and cranking it again whenever you want to get going.Īll these technologies need electricity.Satellite radio, Wi-Fi and Bluetooth connections.Backup cameras and collision warning sensors.Driving today isn’t the same as it was in 1973.
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