Is the battery empty, or is there something wrong with the device? That’s always a difficult question when your walkman or some other battery-powered device appears to be dead when you switch it on.

This circuit runs a fast battery test without the need of power supply or expensive moving-coil voltmeters. It features two ranges: when SW1 is set as shown in the circuit diagram, the device can test ...

For most of us simple is good and simply functional even better. In this regard the very portable PulseTech Xtreme Charge Quick Battery and Alternator test device makes perfect sense. My advice: get ...