Question Internal 12V DC wires in PSU?

[QuowLord]

I am trying to build a custom laptop, which will probably end up as more of a desktop in a briefcase. My question is, does the PSU linked below have a DC input Internally that I can connect a 12V battery to, or, if not, are there any that do? My current planned solution is battery to inverter to PSU, which is not preferable, as that wastes energy and space.
PSU

 

[jay32267]

I think you mean "DC output".
....and as far as connecting to the 12V....you could probably open it up and find it....because it exists where the leads exit the chassis....but you could also come off the 20+4 pin lead wires and split two of them to get 12V without having to open up the PSU.

 

[QuowLord]

I mean DC input, so I can run it(the PSU) directly from a battery. I realize I’m actually looking for about a 100W PSU that is DC-DC And will work with this custom PC build.