A question about alternative power supply for hp41 series

[wojtek]

(02-17-2016 11:39 AM)isanchez Wrote:  Hi everybody,

As you all know it was considered to implement a direct power supply connection to HP41 series by mean of the two small golden balls present in early 41c. This was abandoned and the side conector was used to direct feed the rechargable battery pack. The rechargable battery packs are all dead and are not easy to rebuilt.

Years ago I was using a set of 4 AA batteries connected to the 41c via its side connector with a short cable about 15cm, at least it was giving a kind of mobility. Then I improved this and build a kind of a box for the batteries which was attached to the 41c in a way the card reader is attached.
Anyway I like most the idea of Artur, the one of voltage multiplier 1.5 to 6V.
I have such a multiplier, bought as the phone camping power supply, which is fed by a single AA battery or nimh accu and gives 6V. Perhaps it would be possible to adapt it to power the 41c