> The voltages of batteries, in the first place, is function of state of charge. It's also a function of the rate of discharge. Have a look at this: https://

> The voltages of batteries, in the first place, is function of state of charge. It's also a function of the rate of discharge. Have a look at this: https://marsen.com.au/wp-content/uploads/2021/08/Panasonic-NCR18650B-Discharge-curve.jpg https://marsen.com.au/wp-content/uploads/2021/08/Panasonic-N... All that space between the black and green curves is energy being lost to internal resistance.