Laptop Battery Life ?

Hi, finally got a new laptop, and can play PPD on it like a charm :D
(a laptop with 2 GPU inside : one Radeon, and one for saving battery life, the HD4000.)

But, really, PPD just consumes almost same life battery as 3D Game...
For exemple, I can play 2D games for like 3 hours no problem on my laptop on economy mode, and play 1h30 at Sonic Generations, or other 3D game on my HD4000.
But for PPD, it's 1h40... For a simple video background and notes chart, this is jsut too much :/

Do you have any idea how to go more easy on the game to play longer on battery ?

Thanks ;)

It is because video decoding stress.
You should replace *.mp4 to audio only encoding like *.mp3.

I see...
a mod can't do that ? Like Blackmovie ? (or blackscreen, can't remember.)

It's difficult...
Black Movie mod just show black image over video renderer, so video is decoded.