Please, I need a design (circuit diagram) that helps me monitor the battery level of a battery and also displays the level on a LCD screen. I am making use of an arduino.
A laptop basically has a built in UPS system where AC electrical power is converted to DC and the battery would also serve as backup in event of power failure. I've always heard that a UPS should avoid being plugged into a UPS circuit. So plugging a laptop into a UPS supplied circuit, should this...