The Wirecutter:

After measuring the charging speed of 44 cables, then sending the top 11 to our electrical engineer for teardown analysis, the $14 Monoprice 3ft MFi Certified Lightning to USB Charge/Sync Cable is the one we’d buy. It may be a third-party cable, but the Monoprice stood out among competitors by being the only third-party cable that had as good, if not better, internal build-quality compared to Apple’s own cable. Plus, it’s cheaper than Apple’s by $5.

Always good to have an extra cable or two lying around and the price is right for this one.