Chosen Solution

Hey guys, I was just listening music with low battery and I knew it’ll run out of charge soon. So it happened. My phone is shutdown and I plugged it to the original charger I’ve been using for 2 years and it charged a bit booted and I saw %9 battery. Then it got super laggy and shutdown right away And this just happened on and on and on. The phone is charging just fine but when it boots completely charging stops and with a low battery percentages like %4,%5,%9 it closes after few moments. What is this problem and how can I solve it? Update (09/28/2018) So the problem was charging integrate. Technical service replaced it with a new one and voila. For anyone experiencing this problem solution is change of charging integrate.