On Friday, 12 July 2019 10:44:48 UTC+1, T i m wrote:
On Fri, 12 Jul 2019 10:10:53 +0100, Harry Bloomfield
wrote:

Jim GM4DHJ ... used his keyboard to write :
anybody got one of these ?

No, but the spec. sounds good.

A mate has a more expensive one that he considers to be good.

I cannot see a clip on current probe, so
no idea how they assess that.

For charging I believe they monitor the 'lift' in voltage from loaded
with engine off to with it running.

I like how they describe the DB15 connector as an OBD connector. ;-)

If there is *any* sort of current carried up the fairly heavy leads,
I'm guessing they must have wired the DB15 plug and socket with
multiple pins shorted each side / end?

Such a tool might be 'ok' for people who don't know how to use a DMM
as I'm not sure how useful most of the other things that you couldn't
do with a DMM are?

Cheers, T i m

Internal battery resistance is key to starting ability & is a way to measure battery ageing. So you can use that to assess usefulness of out-of-car batteries. Once fitted, cranking voltage is adequate to give some idea of startability, though it's no precise guide. Some oldies give the battery a real hard time during starting, and some modern diesels require high cranking voltage to start at all.


NT