Mm-hmm , okay.
So uh we discussed an   Excuse me. So we would like to propose battery instead of solar cells and it would be problematic uh to have enough energy with the solar cells
Mm-hmm.
and so we would like to just use simple battery. And also we want to go for titanium design instead of rubber or  and well the problem is with this design we found that we can't use double-curved shapes.