Jastek via Amazon offers the Jastek 60,000mAh Portable Power Bank in Black for $268.99. Coupon code "KOTDOBLD" cuts the price to $215.19. With free shipping, that's $54 off and the lowest price we could find, although we saw it for $16 less in January. It features four USB ports and two 110-240V receptacles for devices up to 600 watts. Deal ends March 31.

Note: It's expected to be in stock on March 10, but still available to order now.