(PeteCresswell) wrote:
- Checking automobile battery voltages

Make sure you turn on the headlights first.

- Checking various other batteries' voltages

Again, no-load voltages are mostly meaningless;
make yourself a test load to get any useful readings.
That the device that uses the batteries is still working properly
is the best indicator of their suitability.

There's a bi-monthly swap meet near me for computer stuff, etc.
that has old voltmeters (analog too!). They are mostly returns
that somebody blew the fuse in and returned.
Watching a needle move *can* give useful information
that a digital readout doesn't easily communicate.