We will definitely sell separate batteries. Concerning screens, I see the point and we need to see how we can include this in the mechanical design (MD). Most commonly these screens get glued into the case and removing could become a major effort and pain. But since we are in direct contact with the factory we can (and will) stock spare parts and will try find ways to make most of the parts replaceable. But I can not promise this for all and everything since making it replaceable often also requires additional mechanics or requires more space or both.
More news on the hardware soon, watch our blog in about three weeks 
Cheers
nicole