HP-35 Battery/Charger question

I've heard that the HP-35 will not operate from the charger without a
battery pack installed.

Is this true?

TIA.
-Steve

[email]sraasch@yahoo.com[/email] writes:[color=blue]
> I've heard that the HP-35 will not operate from the charger without a
> battery pack installed.
>
> Is this true?[/color]

No. It will operate from the charger, IIRC. You're thinking of the
HP-21/25/etc. series which use the batteries as a voltage regulator.

[email]sraasch@yahoo.com[/email] writes:[color=blue]
> I've heard that the HP-35 will not operate from the charger without a
> battery pack installed.[/color]

No. It will operate from the charger, IIRC. You're thinking of the[color=blue]
> HP-21/25/etc. series which use the batteries as a voltage regulator.[/color]

Which means that on the HP-21/22/25/25C/27/29C, if you attempt to
operate the calculator with the adapter but without a good battery
pack installed (and making good electrical contact), the electronics
of the calculator will be damaged! :-(

This saved HP perhaps around $0.25 in manufacturing cost. :-(

Great. Thanks for the information!

-Steve



Paul Rubin wrote:[color=blue]
> [email]sraasch@yahoo.com[/email] writes:[color=green]
> > I've heard that the HP-35 will not operate from the charger without[/color][/color]
a[color=blue][color=green]
> > battery pack installed.
> >
> > Is this true?[/color]
>
> No. It will operate from the charger, IIRC. You're thinking of the
> HP-21/25/etc. series which use the batteries as a voltage regulator.[/color]