I have a lead-acid battery on which I am using a voltage divider to measure the remaining charge.
Its my understanding that an example battery could discharge from 100-0% over say 10.5V - 12V.
What I would like to do now is try to increase the resolution of output of the circuit. So that an input of 10.5V-12V would be linearly related to an output of 0-5V. How can this be done?