Im sure you guys get these types of questions all the time. I have a 18V B&D drill that I converted to lipo. Being into RC I have plenty of lipos lying around a a great 540W 30A PSU with a 400W 20A balance charger. I converted the drill by removing the NiCd and replacing it with a 5S 1.8A 40C lipo. soldered on the leads and traxxas connectors to the lead and to the lipo. Works great no problems there. I also have LVC alarm that also tells me the volts of each cell as well as the overall voltage of the pack. While this works and there is nothing worng with it, I have gotten bit by the electronic bug. PCB's , ICs, resistors, etc, and some guy named OHM. I cant seem to read enough on the subject. I want to build a low voltage cutoff for my drill. Ive seen several schematics for this online but not sure if is what I need. I have learned quite a bit off this website and thought Id post here. Here are a few pics of the finished drill. I just want something more permenant than having to wait for a alarm or keep checking my voltage. I am very familiar with built in lvc's on esc's for my erevo, msr, etc. But dont have a real good understanding with making one without a esc. The simplier the better. The drill does not have the amps or watts on it. All I know is that the RPM max at 1300 and its powered by the above lipo at 18.5 V. How would I go about building a lvc based on that criteria? Thanks for any help.