Nimble Wally Pro Portable Charger, Plug it in. Charge a Macbook or USB-C powered laptop at full 63W speed - or split the charge between both ports for 45W & 18W fast charging. Includes a 10,000 mAh battery which self-charges while plugged in, so it's never out of juice. Just take it with you. Super-Speed GaN Technology transfers more power-faster-using less energy, an incredible 63W of power from the wall outlet or 36W of power as a battery, Built with 72.5% certified recycled plastic, Shipped carbon neutral in plastic-free packaging, 2 Year Warranty.