A question about alternative power supply for hp41 series

[wojtek]

Sorry, I should have been more specific here. I was talking about low discharge accus, like eneloops, which typically have about 1800 mah (although there some low discharges wchich have more than 2000 mah)
Regular nimh accus perhaps can have even 2500mah, according to their makers, but, if you leave for a month or two a fully charged low discharge (with 1800 mah capacity) and a regular accu (with 2500mah), their charge will become the same (because of much bigger discharge feature of regular accu). Later with time every low discharge will win over the regular nimh accu. After three or more months regular nimh will become completely empty but low discharge will still keep more than 80% of its initial charge.
I am using only low discharges and have at home more than 50 pieces of AA and AAA. In the long run low discharges are cheaper than any regular nimh accus.

As for the calculations in the second part of your post, I was talking about 41c in the off state only. I do not know how much juice 41c takes while running, certainly it depends on what 41c is doing. For example if you would leave 41c in endless loop it probably would empty the batteries during less than 12 hours.
I have no data on power consumption of 41c during typical average usage (but would like to know it if anybody knows where to find it.