The perfect tech gift? Discounted lightning cables that won't fray.

There's no shortage of design features Apple nails when it comes to the iPhone. Its controls are intuitive. It can hold an impressive amount of apps and downloads. And its camera quality continues to get better and better.  But there's one major design flaw many of us have been frustrated with since the iPhone's inception: its proprietary charging cables, which are prone to fraying.  But where Apple falls short, other companies are excelling. Take these six durable lightning cables, for instan...