Twin Power Shocker Battery For Harley Softail / FXR / FXE / XL Twin Power Shocker Batteries are endurance and laboratory tested for long and reliable performance with a heavy-duty OEM style case. Features: Absorbed Glass Mat Technology Factory activated and sealed 310 CCA Better cold starting performance Flush mount threaded posts with dual connection points Extra thick plates for extreme vibration resistance Endurance and laboratory tested for long reliable performance Replaces OEM 65991-82B