Sunvalley Brands via Amazon offers the RavPower 22,000mAh USB-C Portable Power Bank in Black for $49.99. Coupon code "78WTB8JJ" cuts it to $34.99. With free shipping, that's $2 under our mention from two weeks ago and the lowest price we could find by $2. It features two smart USB ports, LED indicators, and a USB type-C port. Deal ends January 1.