I have a 2.7V 50F* capacitor and a 4.2V high-power Li-ion slave battery. Based on an ideal circuit that only has the internal battery resistance of approximately 1 m \omega\$ , the RC time constant would be 5ms. However, since charging it above its nominal voltage gets messy, I want to lower the voltage discharged by the battery in a way that offers negligible resistance. How can I do this?
*EDIT: 100F, not 50