Ocean Technology LLC via Amazon offers Prime members the Unitek 24-watt 3-Port Wall Charger, model no. Y-P537, for $12.99. Coupon code "26FO38S4" drops it to $7.99. Plus, Prime members bag free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.25.) That's the lowest total price we could find by $6 for a similar item. It's compatible with Android and iOS devices. Deal ends September 30.