Personally, I haven't had much luck with Lightning cables from many brands, so two for under $10 is a great deal for replacements.
Brad's Deals Editor Michael,
This 2-Pack of Third-Party 6' Lightning to USB Cables, normally $14.99 each, drops from $8.99 to $5.99 when you apply our exclusive code BDUSB6 in your cart at iTechDeals.com. With free shipping, this is the best total price we could find for two of these cables by around $8. These budget replacement cables are compatible with the iPhone 5 and later and the iPad 4, mini, Air, and later models. A 30-day money-back guarantee is included, and there is no sales tax (except NJ).