High Current DC Power Supply
This is unlikely to work.  Most laptops nowadays have more than just power and ground going between them and the charger.  There is often a communication channel too.  The laptop and the charger communicate over some proprietary protocol so that the laptop can scale back and not give you full charging features if you try to use something other than the manufacturer's charger.

Some of this is legitimate in that the manufacturer doesn't want to be on the hook for a warranty repair if the unit got damaged by a crappy charger.  Much of it though is to force you to pay for their overpriced charger.  Nonetheless, it is what it is.

Some third parties have gotten the specs or reverse engineered them for certain laptop brands, and you can by their chargers for much less than the laptop manufacturer's.  Instead of trying to do what you suggest, it would be better to get a bunch of such laptop chargers that are compatible with your brand of laptop.  They can usually be had for low 10s of $, so a small fraction of the price of the laptop.