Understanding AGM Battery Chargers

AGM batteries are becoming more and more popular for use in a variety of applications, including in vehicles, boats, and RVs. However, charging these batteries requires a different approach than traditional lead-acid batteries. That’s where AGM battery chargers come in.

Can You Use a Regular Battery Charger on an AGM Battery?

While it may be tempting to use a regular battery charger on an AGM battery, it’s not recommended. AGM batteries require a specific type of charger, as they have unique charging requirements that differ from traditional lead-acid batteries. Using a regular charger can result in undercharging or overcharging, which can damage the battery, reduce its lifespan, and even pose a safety risk.

What’s the Difference Between Standard and AGM on a Battery Charger?

The main difference between a standard battery charger and an AGM battery charger is the charging algorithm. AGM batteries require a multi-stage charging process that is designed to meet the specific needs of the battery. This includes a bulk charging phase, an absorption phase, and a float charging phase. Standard chargers, on the other hand, typically only offer a single-stage charging process, which can result in undercharging or overcharging of the AGM battery.

What Happens if You Charge an AGM Battery with a Normal Charger?

If you charge an AGM battery with a normal charger, the battery may not receive the correct charging algorithm, which can cause overcharging or undercharging. Overcharging can lead to the battery overheating, releasing gas, and potentially exploding. Undercharging can result in a loss of capacity and a shorter lifespan for the battery.

Do AGM Batteries Need Special Charging?

Yes, AGM batteries do require special charging. The charging algorithm for AGM batteries is different than that of traditional lead-acid batteries, and therefore requires a specific type of charger. AGM battery chargers are designed to meet the unique charging requirements of AGM batteries, ensuring they are charged safely and effectively.


AGM batteries are a popular choice for a variety of applications, but they require a specific type of charger to ensure they are charged safely and effectively. Using a regular charger on an AGM battery can result in damage to the battery, reduced lifespan, and even a safety risk, so it’s important to use an AGM battery charger that is designed to meet the specific needs of the battery.

About the author, Phil Borges

Phil Borges is a battery aficionado. He's written extensively about batteries, and he loves nothing more than discussing the latest innovations in the industry. He has a deep understanding of how batteries work, and he's always on the lookout for new ways to improve their performance.