AGM and gel-cell performance notes

[Nebro]

Originally Posted by Rick

The basic idea is to measure "delta-Volts" and "delta-Amps", ideally at the same time, for a heavy incremental load that is either being added or removed from the battery. The resistance is delta-V divided by delta-I (I for Amps). One convenient method is to use either a 800 Watt to 1500 Watt heater on a power inverter or use a microwave oven while taking the readings.

That is a good idea and much more pragmatic to that i found on this matter, dealing with chemical reactions in the cell and more.
I was looking for an easy way to measure it, you made it, thanks.
and
greetings from sunny provence