I've had repeatable results measuring battery resistance by:
R = delta V / delta I
From Battery University:"DC load measurements work well to check large stationary batteries, and the ohmic readings are very accurate and repeatable."
Sal
MEXICOWANDERER wrote:
Takes energy for electrolysis, and swapping electrons. Then there's heat. Measuring battery resistance is sort of tricky - valid for some things, wildly inaccurate for calculations. Any chemical reaction is not linear. Damned tricky to express efficiency in a simple formula.