By now, we’ve gone through LiIon handling basics and mechanics. When it comes to designing your circuit around a LiIon battery, I believe you could benefit from a cookbook with direct suggest… ...

The battery itself is a low resistance load to the voltage coming back. If the cable is 50 ohms, put a 50 ohm resistor in series with the 9V battery. You should then see about 4.5V going out, and ...