Lagrange via Amazon offers the Lukati Apple MFI-Certified 4-Foot Lightning to USB Cable in White for $12.95. Coupon code "SUKDYEXC" cuts it to $7.95. Plus, Prime members bag free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise, shipping adds $5.14.) That's the lowest total price we could find for a MFi-certified cable of this length by $2.