eBay with vipoutlet has the Stanley Fatmax 1200 Amp Jump Starter with Air Compressor & USB Power on sale for $47 - 10% off with coupon code VIPOUTLETMARCH [Exp 3/31] = $42 with free shipping. See reviews at Walmart.

• Includes 25W USB-C PD and 15W USB-A ports for powering and recharging mobile devices.