Compatible Replacement Battery for Generac 8500 Generator - 12V 9Ah NB - Battery Dimensions: Length: 151mm (5.94") / Width: 65mm (2.56") / Height: 94mm (3.70") by UPSBatteryCenter 12V 9AH NB SLA Battery Replaces Generac XG8000E Portable Generators Add $3499current price $34.9912V 9...