The GYZ series battery is the most powerful, compact Absorbed Glass Mat (AGM) battery available for powersport applications. Advanced lead-calcium technology that holds its specific gravity more than 3 times longer than conventional lead antimony batteries. This means much longer periods between charges when the battery is used in a standby mode, like winter storage.AGM separators with superior grid designs for extreme vibration resistanceMore active material surface area for enhanced performance and powerSupplied Factory Activated (nonspillable)