Gooloo via Amazon offers its Gooloo 40-watt Portable Surge Protector Travel Power Strip with USB Charger for $24.99. Coupon code "XZXK59CC" 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 last month's mention at $41 off and the lowest total price we've seen. It features four grounded AC outlets, four USB ports, and a 5-foot cord.