Motorola — Moto m charging issue

I have buy moto m online on flipcart Jan 2017.few day screen overlay dictated problem arises.it was solved .But later on charging issue arises. First the mobile charge spedly to become full charge it was take two hour.but now in one hour only 5% will charge. What is the couses of slow charging.I have all ready update nought (Android 7).I have all ready check the charger and cable also.please give the solution for slow charging.