All of my phone charging leads have frayed at the ends where you plug it in. I've spent a lot on getting these braided cords that are supposed to last for a while but they never last. I have in total about 20 broken cords.
How do I make my cords last longer?
You could use the common trick of wrapping a spring from a pen around either end of your cable.
http://www.padandquill.com/wp/wp-content/uploads/2016/04/iphone-charger-pen-spring-fix.jpg
As your cable flexes and bends during use, the springs will help relieve the tension being placed on them and over time will slow down the damage you're experiencing.
Here is a good guide on how to do it: http://www.instructables.com/id/Protectect-your-iPhone-iPod-sync-cable/
And a how-to video: https://www.youtube.com/watch?v=VCIo8xGTUX0
I've also used Tetsujin's suggestion in the past and it is a good solution if you have some Sugru handy.
Sugru - not cheap, but very good.
Goes on like Plasticene/Silly Putty, dries like rubberised plastic. Flexible & waterproof, lots of different colours.
