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rcgldr

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## Main Question or Discussion Point

I'm asking this question on behalf of another person who doesn't know english well.

What he wants to know is the relationship between energy extracted from a battery and the corresponding reduction in mass of the battery, and if it would be possible to measure the difference with some type of precise instrumentation rather than than it being an abstract calculation.

Asume that all energy outputs, including electrical and heat related losses are considered in the relationship between reduction of potential energy and reduction of mass.

What he wants to know is the relationship between energy extracted from a battery and the corresponding reduction in mass of the battery, and if it would be possible to measure the difference with some type of precise instrumentation rather than than it being an abstract calculation.

Asume that all energy outputs, including electrical and heat related losses are considered in the relationship between reduction of potential energy and reduction of mass.