Man at B&Q wrote:
On Mar 9, 11:29Â*pm, Theo Markettos
wrote:
If the laptops need individual regulation (which I'd hope they wouldn't,
but you never know), buy N car chargers and then run them off the 12V
rail of a PC power supply or three.

Few laptop supplies are as low as 12V.

Indeed, which is why you use car chargers to regulate from 12ishV to 19V or
whatever the laptops expect. The car chargers are also designed to take
the noisy power that comes out of a car electrical system, so should protect
you if anything goes wrong.

I'm surprised that straight barrel chargers have any kind of intelligence:
I'd have thought all the regulation would be in the laptop. So give the
laptop 19V at 2A (or whatever) and see what happens. I'd expect that any
voltage around there would also work, but it depends how paranoid you are
about frying laptops.

Theo