Successfully completed the soft started board in order to prevent the inrush current drawn by the XL4016 module from tripping certain chargers. It felt endless, I had to use 2 NPN transistors in an inverter configuration in order to not use a PNP transistor since I did not have one lol.

Also 3D printed and replaced the old battery case for a newer one which has ventilation holes, helping in keeping the battery temperatures low..