"The Natural Philosopher" wrote in message
...
Brian Gregory [UK] wrote:
"Man at B&Q" wrote in message
...
The same is not true for alkalis.

The manufacturers data sheet seems to disagree with you. The voltage
drop is reasonably linear over service life. What could give a better
indication of remaining charge? It just requires a slightly different
sensing method.

Those graphs are for a highly artificial case of a constant discharge.

You'll probably find quite a variation in the voltage of a cell with,
say, 50% of it's energy left depending on how quickly it was discharged
to that point.

No: what you find is variation with discharge rate on ON load voltage. Off
load the voltage on all secondary cells is a reliable, though non linear,
guide to charge state.


Primary cells are different. They 'recover' after a hard discharge as they
depolarise.

If you READ what I was commenting on you'll find it was primary cells I was
commenting on.

--

Brian Gregory. (In the UK)

To email me remove the letter vee.