Replacement 2004 Polaris Predator 500 500CC Factory Activated, Maintenance Free, ATV Battery - 12V, 8Ah, UB-YTX9-BS Replacement Battery for 2004 Polaris Predator 500 500CC Factory Activated, Maintenance Free, Sealed Lead Acid Battery Ready to install. No need to add acid. Leak free, sealed design prevents corrosion. One Year Warranty, Voltage: 12V, Capacity: 8Ah UpStart Battery Brand. On Sale for a Limited Time!