We have a device that uses an 18v adapter/power brick, unfortunately the adapter broke. As a replacement, we are considering an adapter that has a "18v ~ 20v" rating printed on its back. There is no switch whatsoever on the power brick to adjust the output voltage. The person selling the item says that the voltage will basically adjust itself based on the device being powered.
Question: Can I use a power brick labeled "18v ~ 20v" for a device that originally had an 18v adapter? Or will this be harmful to my device? Could the self adjusting voltage statement be true?
I understand that for voltages, it is necessary to look for an exact match, while for the amps, we just need to match the minimum. It's just that it's the first time I saw a "~" in the voltage indicator of a power brick. I'm really hoping to be able to use this, since other available options are 19v.
About the device being powered: This is the machine meant to be powered by the adapter: https://cricut.com/en_us/machines/cricut-explore-air-2.html
A video of it in action: https://www.youtube.com/watch?v=LdkyoMDQ5Pw
As can be deduced, it has several stepper motors and several circuit boards.
A troubleshooting video showing the DC board among other parts: https://youtu.be/aNqq-6n_vqs?t=836
A teardown video: https://www.youtube.com/watch?v=ergcvPaaVwk