On Thu, 01 Feb 2018 21:07:39 GMT, Harry Bloomfield
wrote:

submitted this idea :
I'm puzzled by your comments. What sort of lead acid charger is not voltage
regulated?

I didn't actually mention it not being voltage controlled. I had in
mind it might have been a very basic simple charger, using basic
voltage sensing to switch a relay when a set voltage was reached across
the battery. I have one such in my workshop, which charges an emergency
starter battery/ min compressor type thing. You plug it into the mains,
it charges until the battery reaches a set voltage then switches the
charge circuit off. It then remains off/ not charging until the next
time the mains supply is cycled. It is rather a neat way to do it and
proving the mains supply is cycled very occasionally, such a battery
will be kept in good condition for decades, with little electrolyte
evaporation.

But the givaway would be the rectifiers. A FW bridge in close physical
proximity yo the mains input would not be likely at all. The bridge
would be after the TX, unless of course the battery was of such small
capacity there would be little excess power to dissapate. But of
course you would have a supply derived directly from the mains using a
bridge, so you could not then rely on the polarity of the incoming
mains to provide "safe" terminal Voltages.

The fact that the driven device is a scooter makes your interpretation
of the circuit extreemely unlikely.

AB