IPhone 5s won't charge properly?

My iPhone 5s was charging fine, ive never used a fake charger always an official Apple charger. But now, when I plug he charger in it says "this cable is not verified and may not work reliably with this iphone". I've tried 3 different official Apple chargers and they all say the same, I've reset my phone so many times and tried every method Ive found! But when it's plugged in it still says it's charging with the lightning bolt on but the percentage just goes down so it's not actually charging! I put it in my Bose speaker and it charges perfecy fine in that but yet no Apple chargers are charging it… Help!
Why will my speaker charge it but not my apple chargers!

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