Gaming laptop power consumption compared with desktops

[pascalkim95]

I just bought a gaming laptop (Dell Inspiron 15 5000 Series) and just realized how small the power supply is. It has a 135 Watt capacity and comparing that to typical desktop of 600+ watts this is tiny.
I understand that most laptop parts are under specs than equivalent desktop parts. Mine comes with a gtx 1050 and i5 7300hq. The mobile version of the 1050 probably uses a bit less power than the desktop version and the cpu is definitely not as power hungry.. but the laptop has a moniter as well.
I guess my question is how do they achieve this? For instance, will I still be able to use the laptop off just the power cord without the battery pack installed?

 

[rgd1101]

https://www.techpowerup.com/gpudb/2917/geforce-gtx-1050-mobile
https://www.notebookcheck.net/Intel-Core-i5-7300HQ-Laptop-Processor.189854.0.html
1050 75W 7300HQ 45W

And desktop depend on what the components , can go low to 150-180w for the same setup

 

[pascalkim95]

https://www.techpowerup.com/gpudb/2917/geforce-gtx-1050-mobile
https://www.notebookcheck.net/Intel-Core-i5-7300HQ-Laptop-Processor.189854.0.html
1050 75W 7300HQ 45W

And desktop depend on what the components , can go low to 150-180w for the same setup

Thanks for thr reply.

So that leaves 15 watts to power all fans moniter hard drive ram and such. Doesn't seem like enough..

 

[jaguarskx]

Keep in mind that TDP specs does not equate to actual power consumption which is typically lower than specs.

And laptops draws power from either the battery or the AC adapter, not both at the same time.