On Sun, 23 Jun 2019 03:07:05 +0100, Xeno wrote:

On 23/6/19 2:03 am, TMS320 wrote:
On 21/06/2019 21:19, Commander Kinsey wrote:
How does a lead acid battery charger (or car alternator) know when to
switch to trickle charge?

It doesn't.

I can understand it noticing a drop in charging current if the battery
is on its own, but what if a random changing load is connected, as
there is in a running car?

Ohm's law.

That's a bit *deep* for some people to comprehend.

It's also impossible to use it without having a remote (to the alternator) sensor. It's like my power company telling me if I'm using a kettle or a toaster.