How much power does extra memory in a netbook consume?

[freebooter]

I recently bought an Aspire One netbook with 512M ram. My immediate thought was to upgrade to 1.5G by adding a 1G module. But I wondered how much extra power will the extra memory use? The less power the netbook uses the longer the battery will last and I doubt whether I will be doing that intensive tasks on it so is it better to just get another 512 or leave as is? The cost is so low that upgrading is attractive.

 

[freebooter]

Thanks for the replies. I will probably go for the full upgrade to 1.5 then. It is a hd version btw.

james - Interesting link. I got the hd version because it was going cheap and the ssd models only have small ssd. But I had thought about swapping to ssd in the future as it sounded like a good match with the netbook idea but part of that was thinking it would be lower power.