Im currently planning out my (first) conversion of an old 18V drill with dead NiCad cells to 18650 Li-Ion. I have enough cells that should support the high discharge rates and I'm putting them into a 5S configuration.
My question: should I use a buck/boost coverter to keep the voltage steady at 18V or will the motor (most likely) be fine with the voltage range of fully charged and discharged Li-Ion cells (roughly 15 - 20V)?
If possible, would a 5S2P configuration be preferrable, to "spread out" the current over 2 cells? Would a different BMS be required for that?