[Ray’s] breadboard power supply lets you drain the last traces of power from ‘dead’ AA batteries. Electronics that are powered off of disposable alkaline batteries have a cutoff voltage that ...

Our evaluation included extensive discharge tests to find long-lasting alkaline batteries -- including AA, AAA, C, D and 9-volt options. We also considered the cost per battery for each option to ...

Yes. But here's what I didn't know: AA and AAA batteries put out the same 1.2- to 1.5-volts. That's why the AAA battery could power the dead computer mouse. Voltage is the difference in charge ...