Welcome, slowgrowth.  I gave you 5/5 points.  Yes, a detailed report on batteries and battery development and free.  Not everyone will be interested in that technical report, but I am glad you made reference to it as another resource to refer to about questions in that area.

I hope other member welcome you with 5/5 as well.  We are a small group and our growth is indeed "slowgrowth".  That just means that every contributing member who abides by the "6 Rules" of Agoracom is welcome.

Okiedo