On Mon, 25 Sep 2017 07:53:49 -0700 (PDT), "
wrote:

On Monday, September 25, 2017 at 10:13:48 AM UTC-4, wrote:

If it's only marked in whole volts, reading it with accuracy won't happen, so it won't be especially accurate.

How so? I suggest that you are mistaking "accuracy" for "precision". They are not even a little bit the same thing nor follow necessarily one from another.

+1

A gauge or meter that reads (is marked) in whole numbers but is dead-on is far more accurate than a gauge or meter marked in thousandths, but is always two units off.

Yup, that's the thing ... and why many battery meters are calibrated
with red, amber and green sections. Now whilst that would work for me
re charge (voltage) and loosely therefore charge status, it wouldn't
be useful to pin down the discharge / charge status (unlike say a CCA
tester) as the terminal volts are a function of load.

Although the latter meter is extremely precise.

Yup and I have some of those. Highly repeatable but always 'out' by
some amount. ;-(

I have a metered Iso-Variac that reads in volts measured in tens, and amps measured in tenths on a 0 -1 or 0 - 4 scale. But they are 4" meters so that even very slight needle movements are visible. The human brain is pretty good at interpolation.

And it was the latter thought that I was using when it came to this
meter. ;-)

Take something that offers a very 'human' way of displaying something
(like an analogue car fuel or specifically, temperature gauge that
starts at say 60 DegC) and retain the merits but improve the general
meaning / readability.

Mileage / trip counters are more suited to being 'digital' etc. ;-)

Cheers, T i m