Smartphone doesn't charge over 60%

Jul 2, 2018
11
0
10
A year ago I bought a new smartphone (LENOVO K6 NOTE), it never gave me problems until two days ago when I connected it to my charger and went to sleep and the other morning the phone was still at 60%...there was still the bolt on the battery icon but nothing was happening. To charge it completely I had to unplug and replug the cable.

Before this problem I noticed that the battery life was becoming shorter everyday until it got to a point where it lasted for 5-6 hours in battery saving mode (without playing games or watching movies)(by the way my battery is 4000mAh).

Now my question is: To solve this problem do I have to change my battery, my charging port, both or I can resolve this without spending money?

(I say sorry for all my typing errors but i'm italian and my english istn't perfect :cheese: )..