[Marc412]

Hi

I changed my battery 2 months ago. I performed the calibration with ISTA. Everything works in the car no faults
This morning, I did a test with ISTA 4.39.20 and I got the message below: Test the battery charger or the calibration?

I carry out the test without an external battery charger and with the engine stopped.

Which charger is it? Is this the car's charging system?

I specify that before I tested with an old version V3.47 of ISTA, and I have just installed the new version: ISTA+ 4.39.20?
Is this a new test of this version 4.39.20

Or how to test the car battery charger and recalibrate it?