https://i.imgur.com/Q2Z5qoI.jpg
节录几点
The difference boils to Einstein's = 2.
Let me just emphasize that the energy can't be calculated from masses of the electrons.
One could say that when a battery is being discharged, its electrons are moving to places that are closer to the nuclei, perhaps other nuclei, in average and the modified interaction energy affects the amount of energy=mass stored in the electromagnetic field.
Yes, the change of the mass is pretty much negligible and can't be measured by current scales.
基本上跟E=mc^2是有相关的没错
但这里的质量变化并不直接是电池减少或增加的质量
再来就是电池充放前后重量的确会有变化
但难以测量出来
几乎是可完全忽略的