Nubeestore via Amazon offers Amazon Prime members the Volmate 6.3-Amp Triple USB Car Charger for Apple in Black/Silver or White/Silver for $17.98. Coupon code "V63A7OFF" cuts it to $10.98. With free shipping, that's $9 off list and the lowest total price we could find. (Non-members can spend $35 or more for free shipping; otherwise, it adds $5.18.) This MFI approved charger features a 2.4A, 2.4A, and 1.5A port for a combined 6.3A.