Razor MX500 / MX650 36 Volt 12 Ah Battery Pack | Razor Pre Wired Factory Original Battery | Part W15128190003 (Three 12 volt 12 ah batteries) Replacement 36v Battery Pack for Razor MX500 and MX650 Electric Dirt Rocket dirt bikes. Battery set includes terminals and wires. 36 Volt 36 Ah Pre-wired (3 Batteries)OEM Length (each battery): 5.91 inches Width (each battery): 3.74 inches Height (each battery): 3.70 inches