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[Clifford Heath]

On 20/11/21 3:29 am, jlarkin@highlandsniptechnology.com wrote:

On Fri, 19 Nov 2021 10:21:02 -0500, Ralph Mowery
rmowery42@charter.net> wrote:
I let a car battery go dead because the car was not driven enough. My
best charger would not let the battery start to charge. I have an older
very simple charge that is only a transformer, diode and meter that I
hooked to the battery for about half an hour and then I could use the
better automatic charger.

I once had to use 120 VAC and a diode and a hair drier ballast
resistor to bootstrap charging a car.

Some devices with a 2-step dimmer have the necessary diode inside.

A friend was stuck with a flat battery at his cousin\'s place.
He used an old halogen lighting transformer to get going
They have called him McGyver ever since...

CH