Why Do My Charging Cords Stop Working. On a 5S there should be no difference in charging rate for any certified cable as long as the power source can supply at least 1 amp. I wrote this as a reply to another answer below but I might as well paste it as an answer as well.

Everything on Earth will stop working after some period of time. Answer 1 of 4. Fast charge appears only on safe mode for 2-4 seconds then stops charging at all and also stop recognizing any cable Samsungs or not for a good 10 mins.
Most of mine are still going strong 3 years later but my travel one that get shoved in pockets a lot I replace once a year or so.
Apple cables have ranked among the lowest-rated products in Apples own online store for years. Still this doesnt mean that a faulty USB cable will completely stop charging your phone but its enough for a connector to break down and you will see that your Samsung Fast Charger is not working anymore. There could be many reasons for that. Answer 1 of 11.

