Anker PowerCore 10000 PD is available on Amazon US for $29.99. Get 35% off when you enter promo code ANKERPD335 during checkout.
Supports 18W USB-C Power Delivery. Fast charges iPhone 8/X/XR/XS and Google Pixel. Will also charge a Nintendo Switch while you play in handheld mode. 10,000mAh is a great size for travel and a day out. Keeps two phones going all day. Or get 4+ more hours playtime out of your Switch.
Includes a USB-C to USB-C cable and travel pouch.