What is the maximum voltage that can be used on HP-25?
Unofficially, I'd say at least 3 vdc, since I've used AA alkaline 1.5 vdc cells w/o any problems.
Hi Roberto,
do look up this discussion http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv011.cgi?read=29484
the answer suggested is 3,2Vcc.
Jacques Laporte is an authority on the Woodstock series.
http://www.jacques-laporte.org/Woodstock/ws_HW_main.htm