Replacement 2008 Yamaha YW50A Zuma 50CC Factory Activated, Maintenance Free, Scooter Battery - 12V, 4Ah, UB-YTX5L-BS Replacement Battery for 2008 Yamaha YW50A Zuma 50CC 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: 4Ah UpStart Battery Brand. On Sale for a Limited Time!