Which video codec/format is best for laptop battery?

Greetings,

Would there be some kinds of encoded videos that are easier on a laptop's battery life than others? I'm curious about this as I get ready to go on a flight and I'm not sure if I'll be able to recharge my laptop.


I would imagine that anything that is using hardware decoding would be better than software decoding...is there some kind of tool like CPU-Z that can tell you what formats your computer can natively hardware decode?


Thanks for any help.


Matt