Jastek via Amazon offers the Jastek 60,000mAh Portable Power Bank for $249.99. Coupon code "9DK77XRC" cuts the price to $197.49. With free shipping, that's $53 off list and the lowest price we could find, although we saw it for $10 less a week ago. It features four smart fast-charging USB ports and two 110-240V receptacles for devices up to 600 watts. Deal ends April 27.