Replacement Battery for Razor MX500 MX 500 650 MX650 Dirt Rocket Scooter - 3 Pack UPG # D5744 UB12120 12V 12Ah. Pack of 3 Dimensions: 5.94 inches x 3.88 inches x 4.06 inches. Weight: 8.16 Lbs SLA/AGM maintenance free, spill proof battery Rechargeable battery that can be mounted in any position, resists shocks and vibration 1 Year Warranty