Razor Crazy Cart battery upgrade: from Pb to Li-ion power tool battery - YouTube
Razor Crazy Cart Battery Adapter - The Grid Racing
Amazon.com: Razor Crazy Cart Rechargeable High Performance Replacement Batteries + Wiring Harness Beiter DC Power (This Does not fit The Razor Crazy Cart Shift) Beiter DC Power : Sports & Outdoors
Razor Crazy Cart Battery Kit with UK charger | 1080 Riders