On Oct 13, 8:55*pm, "RogerN" wrote:
"Jim Wilkins" wrote in message
...
By using a series resistor I can make the supply current go to zero as the
voltage approaches full charge voltage. *This gives a power source that is
limited in both voltage and current.

RogerN

If you set the circuit up and measure it you'll see that the current
decreases naturally as the battery voltage nears the open-circuit
output of the supply. The $4 HF meters are good enough for this,
barely, and cheap enough to risk frying from an accident. The meter
lead and shunt resistance on the 10A setting will round off the
current/voltage transition knee.

Kelvin connections won't account for the battery's internal resistance
or surface charge effects. Some smart chargers periodically shut off
the current, wait a bit, then measure the battery voltage after it's
had time to settle.

jsw