photoshop for macbook

I would think that installing two gigabytes of ram would potentially decrease battery usage (and thus increase uptime) as you are partitioning resources/programs over more ram (dispersing, rather than focusing on one gigabyte of ram), potentially making it easier for your Mac.

But I could be wrong.

Regardless, you should be fine in terms of running Photoshop and Matlab on 1 gigabyte of ram. I did it on my old Powerbook that had 756mb of ram, and both programs ran pretty smoothly.

I would increase the ram and not worry about the battery issue as this is not true.
Adobe PS will thank you for the extra Ram and won't have to work this hard and in return use less power.

im pretty sure that increasing more ram will decrease the usage of battery....since the mac will work less on trying to run programs, well that's what i have been told and it does sound pretty convinsing!
anywho having more ram wont hurt it will help your mac a lot and plus it will go faster!🙂