Power supply for voice recorder (replacing two AAA batteries)?

Question

Batteries

At work, I use a voice recorder to record calls. Almost all the work is on the phone, so the batteries run out quickly. There was an idea to make or buy a power supply to replace these 2 batteries. (Yes, I know that there are rechargeable ones, but for me this is an extra hassle)
Maybe take some kind of power supply and wind the wires from it to the contacts of the recorder? What power supply?
I'm asking for advice on how to solve this problem.

Answer 1

You need a 3 volt power supply. There used to be such - with a switch of 3 - 4.5 - 6 - 9 - 12 volts. They cost a penny, in any kiosk. Have not seen for a long time.
Yes, you can screw it on. + to plus, - to minus from above.
Or take any charger from a mobile phone, 2 "rechargeable" batteries and a 1 kilo-ohm resistor - screw it in the same way, but through a resistor. Batteries will charge at night and work during the day.