Lenovo offers its Lenovo PB410 5,000mAh PowerBank, model no. 888016288, for $29.99. Coupon code "USP1JL456288" cuts it to $14.99. With free shipping, that's $3 under our mention from last winter and the lowest total price we've seen. (It's also a current low by $15.) Features include intelligent charging and a full-metal shell for impact protection. Deal ends July 29.