On 11/04/20 11:21, Dave Plowman (News) wrote:
In article ,
Bert Coules wrote:
"The Natural Philosopher" wrote:

And how can I tell when the battery is sufficiently charged?

when the terminal voltage is over 13V

But how do I tell that? There's no meter or any other indicator sort of on
the charger.

Leave it on for 24 hours.

A simple 6 amp charger will only charge at 6 amps for a short period (if
ever - many are extremely optimistic) and as the battery volts come up,
the charge rate will fall.

If the car won't start after 24 hours and the charger was working, chances
are the battery has had it.

You can check the charger is working with a simple DVM or other method of
measuring the volts. They will be higher on charge than off charge.

The OP said that he doesn't have any method of measurement,
unfortunately. Might be simplest to charge for 4 or 5 hours, then turn
off the charger and turn the headlights on for a minute:
1. Headlights don't come on - battery buggered. Replace asap.
2. Headlights come on and stay on - battery ok. Continue charging.
3. Headlights come on and slowly fade - battery on the way out. The car
might start and get you from A to B, but I wouldn't guarantee getting
back from B to A! Replace battery asap.

--

Jeff