After a bit more investigation while I wait for the parts... I think it should be quite fine, beacuse the battery will probably be the heaviest part, but it is quite possible that either left or right side of the laptop will be quite heavier. Hopefully I'll make it fit :D I found an interesting battery with 12V in and separate 12 out and another 5V USB out, so it should be fairly straightforward hopefully with that to power everything with it.