For legit portable power, the Zendure SuperTank is at the top of the stack. It’s a 27,000 mAh portable charger with dual USB-C PD (100W + 60W) & dual USB-A ports, capable of charging your MacBook Pro from 0-100% in just 1.5 hours, plus power up all your other compatible devices. It’s also equipped with 4 USB outputs. The design is super-durable and it takes just 1 hour to fully recharge. Another funded Kickstarter.