Hello AT: Home Tech, My question is do backpacks with solar panels like this one by voltaic systems, (or any portable solar panel device, for that matter) actually work for charging a laptop? I have a four year old iBook G4, and am interested in a product like this, because I will be travelling internationally over the next few years. This type of product would seem to eliminate the hassle of trying to figure out what type of voltage adapters I need, as well as avoid the aggravation which arisess from finding out I packed the the wrong one. Any guidance/advice people could offer here would be great appreciated. Thanks, Kathleen Hi Kathleen, Since we haven't had any experience with these we'll throw it out to the readers. Any of you out there have experience with these? Thanks for the question!