[woodchips]

There are three voltage ranges, 2V, 20V and 40V, so presumably lead acid single, 12V and 24V cells/batteries.

Ammeter scaled to 50A but I would reckon 20A is probably nearer. The 2V setting with the additional 6V boost I seem to remember at being 10A or so.

Have a 60 minute run back timer to measure capacity.

I think! Just looked at the one I have here but not used it in many years, too useful to dispose of, too large as well.