HP-41 rechargeable battery pack repair

[Massimo Gnerucci]

(07-16-2018 03:27 PM)burkhard Wrote:  A few questions:
1. So, why does your pack have 3 pins? Is that a "Euro thing" or a "late production thing"? The packs I have myself and seen in the US (admittedly not a whole lot) are all 2-pin.

Actually, they are an "early production thing". I can confirm this since I bought mine in 1980. And you can check this old thread too.