Share your experience with Powerline cables

I own several Powerline and Powerline+ micro USB cables that charge faster than anything else I’ve ever tried, even original cables. They are more durable than anything else I’ve seen too. The problem is I’ve gone through 3 cables where the connector becomes loose on the phone and then doesn’t have a snug fit like it did when it was new. I’ve returned cables under warranty only to have the same thing happen again after a couple weeks.

Anyone else have this issue too? I’m wondering if I’m getting defective cables or if the connector has design issues.