Car batteries don’t just die. Well, they will if you leave them for long enough. but not just over the course of a few hours or even just a day or two. Finding your car has a dead battery after it was ...

LEDs often serve as the light source in a backlighted display, and they usually operate from a low battery voltage such as that produced by two NiCd cells or one lithium-ion cell. An IC from Maxim ...