The fastest way is with an inverter, which turns a car's cigarette lighter into a standard outlet. If you have a new laptop with USB-C, you could charge it with a power bank or car adapter.

Jingyu Yang Inverter, Servo, PLC, Robotics Manufacturer’s Post Jingyu Yang Inverter, Servo, PLC, Robotics Manufacturer Regional Sales Manager 5d Edited ...

Abstract: This paper proposes a high-frequency (HF) square-wave voltage injection method to identify the parameters for three-phase permanent-magnet synchronous motor ...