> That's fine. In that case, I'll have to build the low voltage protection
> into my circuit.

If you have a uP present then high and low voltage control is easy.

But, 2 x TL431 , one for HV and one for LV would form the core of a
charger and end of battery capacity termination.
( US 1.8 cents each in China in 10,000 or so volume  -  "slightly
more" from Digikey.)

The HV one can eg  turn off a high side PNP by clamoing its driver
when Vbatmax is reached.
Low side one transits from ground to o/c on cathode when Vbat falls to low.

OR a single TL431 and a few opamp sections

(Many reference diodes would be fine - I say TL431 because it is
usually cheap and available. Possibly the world's most used IC. Also
possibly the cheapest.


         Russell
--=20
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