Amazon offers Prime members the Belkin Mini Surge Protector with USB Charger, model no. BZ103050-TVL, for $9.74 with free shipping. (Non-members can spend $35 or more to bag free shipping; otherwise, it adds $6.51.) That's the lowest total price we could find by $5. This portable surge protector features three AC outlets and two powered USB outlets for MP3 players and cell phones.