Gooloo via Amazon offers its Gooloo 40-watt Portable Surge Protector Travel Power Strip with USB Charger for $24.99. Coupon code "6HQX7E8B" cuts it to $18.99. Plus, Prime members bag free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $7.10.) That's tied with our mention from a month ago, $41 off, and the lowest total price we've seen. It features four grounded AC outlets, four USB ports, and a 5-foot cord.