- T6.1 Ocean 150
If they are lightly sulphated you might recover them by keeping them at float voltage (Not during our ownership but I can’t account for the previous owner during the 20 months they had it……..?
The sensors will report the battery internal resistance. It looks like this is averaged and then available from 6D (Special function) on one of the vehicle canbuses. Internal resistance is a reasonable indicator of battery health. One day I might try sniff the raw data off the Linbus and correlate.
Obtaining the data from the canbus is about a 10 minute job with OBDeleven. Data will not be accurate if sensors have not been connected to the batteries for some time.
I see LA80 batteries on sale for 80 quid a piece at some place with an expired security certificate (might be a dodgy site). 136 quid a piece from Tanya.
If we assume a voltage drop of 0.4V drawing 10A we can infer a resistance of 40 milliOhms. Typical new AGM batteries of this class should have around 3 milliOhms each or 1.5 milliOhms total.
Edit: adjust voltages for Scottish winter temps.