AGM – Absorbed Glass Mat

Inert Fiberglass Sponge

Absorbs Liquid Acid

Highly Porous
Large Pores Reduce Electrical and Ionic
Resistance
Tortuous Path Prevents Shorts
Transfers Oxygen through Unsaturated
Pores
Immediate Oxygen Recombination
High Active Material Utilization

Sensitive To Voltage and Temperature

AGM vs Gel

AGM Designs Have Lower Resistance
• Better High Rate Performance
• Better Power and Energy Density
• More Sensitive To Voltage and Temperature
AGM Designs Have Better Recombination
Efficiency
• Separator Saturation Established During Manufacture
• Gel electrolyte Has To Develop Cracks For Recombination
AGM Requires More Stringent
Manufacturing
• Handling AGM Separator / Controlling Acid Volumes
• Gel is Like Flooded Batteries With Special Electrolyte