Looking to find a battery monitor program which will log when my laptop is operating on battery power. When I wrote monitor, I’m specifically looking for a program that will log when my laptop switches to battery power. Here is a scenerio, my laptop is operating on ac/dc power and the power goes out, I would like a program that will log (1) the time the laptop begins operating via battery, (2) the time the laptop goes back to ac/dc power, and (3) the during of that on/off cycle.