HP80 battery pack voltage reversed

[Harald]

(11-04-2016 11:27 AM)Alejandro Paz(Germany) Wrote:  

Quote:I don't think so. All Classic models HP-35/45/55/65/70/80 can be run without batteries, because they have a fixed 4.5 V power from the charger and don't need the batteries as buffer.

Bernhard

, Sorry. The ones that could be destroyed are the HP-21, 25 and so on.

65 and 67 shouldn't be used without a battery installed either. The card reader draws its power directly from the battery and could be damaged as well.