GWguy
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I assume it's some kind of miniature DC-to-DC inverter which boosts the low battery voltage to 1.5V. It would sure cut down on batteries heading to the dump.
http://money.cnn.com/2015/06/02/technology/make-battery-last-longer-batteriser/index.html?
http://money.cnn.com/2015/06/02/technology/make-battery-last-longer-batteriser/index.html?
AA batteries start off with 1.5 volts of energy, but the voltage goes down as the batteries are used up. Once the batteries dip below 1.35 volts, they appear to be dead, even though they still have a lot of juice left.
Batteriser can continue to deliver a 1.5 volt charge from batteries that have actually discharged down to 0.6 volts.