12V Safety

What exactly do you mean by "danger" and "through". How do you "put 12V through a 20V laptop"?

Tom

What are voltage ranges over which the devices will work? If 12V is outside the range then the device won't work properly or at all.

Why do you want to know?

Yep. The worst thing it could do is not work. Much like plugging a 220VAC device in a 115VAC outlet.

Under voltages could cause some problems but likely will not. An exterme difference may cause too much heat and damage the insulation. But you are talking about very small differences.

The laptop may not turn on at low voltages, but the drill will work, just don't expect the output to be as strong.

We had a 120vac coil running on 24vdc for a few weeks and it onle lost some holding power, but no noticable damage.

The laptop will not work or will not charge the battery. The drill will work on reduced RPM/power...

Thanks so there is no harm in trying... If I don't reply in the next few days, you will know what has happened...

I can only say I simply would not do it. There is no known reason to try it, unless you are happy to risk having a damaged Laptop.......

Use only the correct voltages and polarities........