Wondering how to turn off your phone? It's not a silly question. A power switch used to be the essential function of any electric device. But as phones have become more sophisticated, and turning them ...

Wondering how to turn off your phone? It's not a silly question. A power switch used to be the essential function of any electric device. But as phones have become more sophisticated, and turning them ...

The circuit in Figure 1 provides a simple and inexpensive way to protect one of the most valuable components in portable applications: the battery. Applications include all portable equipment that ...