Need some assistance. I am not sure if this is the correct forum.
I have an OverDrive JLX RC vehicle. The original battery is 12V 800mAh and I am unable to find these batteries anywhere. I decided to make a 3S battery pack from 18650 cells with a 10A battery management system (BMS) board. The pack charges fine and when connected to the RC vehicle it runs fine, however the 18650 3S pack gets really warm and the wires get really hot.
I can't seem to find the specification for this toy so I am unable to tell what is the current draw of the motors. I assume it's getting hot because it is being discharged too quickly? Would adding a resistor suffice as current limiting, and if so, how would one calculate the value without knowing the current draw of the motors?