Martin Hvidberg
11-15-2004, 10:04 PM
I have a HP 21 calculator (the old one from the 70's) It's out of battery
and I want it recharged. I don't have the original charger and was going
to use another power source. It seems (from HPmuseum) that 10 Volt AC /
1.8 VA is what I need.
Questions: Is that right, should I really use AC not DC? What are + and -
in the little conector on the back?
Any help is apprisiated
and I want it recharged. I don't have the original charger and was going
to use another power source. It seems (from HPmuseum) that 10 Volt AC /
1.8 VA is what I need.
Questions: Is that right, should I really use AC not DC? What are + and -
in the little conector on the back?
Any help is apprisiated