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Ralph Spencer
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https://www.physicsforums.com/showthread.php?t=397828 < My own research in the past.
Have You Ever Experienced the 'Lighter' Feeling of Spent Batteries?
- Thread starter Mu naught
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The discussion centers around the perception that spent batteries feel lighter than fresh ones, with participants exploring the psychological and physical aspects of this phenomenon. While some participants suggest that differences in weight may stem from brand variations—where cheaper batteries might weigh less—others argue that the mass of batteries does not significantly change during discharge. Theoretical calculations using Einstein's E=mc² indicate that any mass loss due to energy conversion is negligible and beyond the sensitivity of common scales. Participants also consider the possibility of gas venting in alkaline batteries as a potential cause for reduced mass, but emphasize that this is not a typical occurrence. Overall, the conversation highlights the importance of psychological perception and manufacturer differences in the perceived weight of batteries rather than any actual loss of mass.
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