I want to be able to output lipo battery voltage to a display the remaining juice in the battery much like a fuel gauge. It has to work for 1s to 6s batteries and it would be ideal to work using an AVR microcontroller. A lot projects out there are focused on 1s batteries and they normally use a voltage divider connected to ADC. I know for a fact that a voltage divider will drain the battery quickly so you have to use a mosfet or something similar to pulse the voltage. I'm fine if the solution is close to accurate and not really intending on using TSSOP packages or other SMT ICs. I want to be quickly breadboard this and prototype as well.
Any schematics or thoughts about how I can achieve this variable voltage sensing ?