Oftentimes we can’t find the original AC adapter and must use 3rd-party adapters.

https://www.groovypost.com/howto/choose-right-power-adapter-charger-phone-laptop/ describes “voltage too high/low” and “current too low”

==== based on https://www.cdw.com/content/cdw/en/articles/hardware/how-to-choose-the-right-ac-adapter-for-your-device.html

Choosing an adapter with a higher or lower voltage may cause the connected device to malfunction. This happens if the adapter’s VDC is lower than the device’s input voltage even when their current ratings are the same.

Using an adapter with a higher voltage will cause the connected device to detect an overvoltage. An AC adapter supplying electricity at a higher voltage than required will cause the connected device to run hotter. Sending power at a higher voltage will also shorten the lifespan of the device and may fry its internal circuits.

–Using an AC adapter with a lower current rating can be an issue. When considering how to choose an AC adapter, avoid picking one that delivers a lower current than required by the device. Even when both the adapter and the device have the same voltage rating, the device will attempt to draw more current than the AC adapter can manage. This can cause the adapter to overheat. The device may fail to power on or struggle to stay on. If the current is too low, the electronic device may stay on, but its battery will not charge.

It may surprise you that you can use adapters with higher current ratings than your devices. This recommendation holds true, as long as both devices have the same voltage rating. For example, a 10V/8A adapter can safely power a 10V/5A device.