I am trying to build a custom laptop, and I am aware that this will probably be rendered used primarily as a proof of concept. I am also aware that this has likely already been done. My question is whether anyone can find a way to reduce the cost of the parts listed in the spreadsheet attatched, while still making it useable and not exceeding the ratings of parts. Please note that I would prefer amazon links for everything. the battery has to be able to provide 100 watts though, and preferably last 1 hour at least. The main issue is that it converts DC to AC, then back to DC.