This is the official Razor replacement 36 Volt Battery Pack (set of 3 12 volt batteries) made by Razor specifically for the Razor MX500 and MX650 Dirt Bikes. Includes battery terminal wires (wiring harness) which are pre-wired to the battery which makes replacing your MX500 or MX650 battery straight forward. You wont have to fuss with trying to decide how to wire your 3 MX500/MX650 battery packs together. You will simply need to connect the plastic connector at the end of your MX500/MX650 battery wiring harness to the connector on your bike, just like the original Razor MX500 or MX650 battery that came on your bike.
* Razor Battery Care Information (PDF)
This is Razor part # W15128190003.