Ocean Technology via Amazon offers Prime members the Unitek 2.0 Desktop Charger
, model no. Y-2173A, for $16.99. Coupon code "7ITBH9Q4" 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 $6.48.) That's $32 off list and the lowest total price we could find. It features four USB ports and is compatible with Android or iOS devices.