Amazon.com: Made by Mitchell Mounts Milwaukee M18 Battery, Wired 16AWG, Power Your Robot, e-Bike, Lights, Tools PN M18-MSL : Electronics
Power Wheels – Milwaukee Battery Run-time Tests & Low Voltage Protection Installation – Havocware
Components for Battery Packs - Würth | Mouser
Amazon.com: Made by Mitchell Mounts Milwaukee M18 Battery, Wired 16AWG, Power Your Robot, e-Bike, Lights, Tools PN M18-MSL : Electronics
Installed 2 Milwaukee m18s in parallel. With voltage controller and a battery over discharge controller. Run time is about 1.5 hours and charge time is also 1.5 hours. : r/PowerWheelsMods