Can a user measure voltage with the 41-C series?

[4ster]

(04-20-2015 05:51 AM)Dieter Wrote:  For the record: the BAT annunciator in my HP41s comes on at approx. 1 V per cell, which is the point where NiCds and NiMHs can be considered discharged. BAT does not appear with properly charged NiCds or NiMHs unless they are nearly depleted.

(04-19-2015 10:11 PM)4ster Wrote:  I've been checking state of charge with voltmeters, I was just thinking that being able to do that on the calculator itself would be useful.

You cannot check the state of charge of a NiMH or NiCd battery by determining its voltage. OK, if the battery is close to empty this might work, but else the voltage is nearly the same from almost-freshly-charged to almost-empty.

Dieter

Good points. So, for those of you that run NiMH in your HP-41s, what is your battery cycle strategy given that the BAT annunciator is not really useful with this type?