Why Is Phone Not Fast Charging. Navigate to Settings tap Battery select Charging and enable fast charging if its disabled. It could be up to 98 continuing in 1500 milliA and then slowing upto 1000 ma in last 2.

Once this is done check if the phone will now fast charge. After this plug in the phone with the original charger and see if fast charging is working properly now. Yes fast-charging is related to temperature.
I googled for the solution but couldnt find the right.
Rarely though if your phone is relatively new it might be a software issue. Wait for 30 seconds turn on your device enable fast charging again and check the results. Sometimes without being aware of what kind of charger we are using we may face some issues with it. The power adapter however was 5W.

