HP 82241A charger replacement polarity

[grsbanks]

(01-27-2021 07:04 AM)edwincool2 Wrote:  Does anyone have any experience with non-original chargers?
I found one on amazon made by Kircuit, you can find the link here: https://www.amazon.com/Kircuit-Adapter-I...B081SP325G

No specs are given for that adapter (it's certainly not a charger because the 82240A/B isn't a rechargeable device) so I wouldn't trust it, personally.

(01-27-2021 07:04 AM)edwincool2 Wrote:  Also, in the manual it specifies not to use the AC adapter without batteries. What is the reason for this?

The adapter (or the power distribution circuits inside the printer) may not be able to provide enough amperage when the carriage motor is running and the print head is running flat out. Any extra power it needs it'll take from the batteries.