Hi, I work for a Critical Power Systems company and we are currently branching into the development of Lithium Ion battery solutions. We had a request from a Tesla Model S owner to start investigating the potential of a new custom built Lithium battery pack specifically designed for the Tesla Model S. The request was for a 12V 40Ah capacity Lithium battery. I'd love to know a few things: 1. Is there a large following for a product like this? (ie. are there many owners whom would be interested in purchasing such a battery pack, please speak for yourself rather than speak for others) 2. Are there any specific design criteria people would like to see? (ie. larger than 40Ah, less than 40Ah, built in 120VAC inverter or 12V cigarette outlet for the frunk, etc...) 3. What price point would people be interested in buying at? Thank you very much, please email me at firstname.lastname@example.org if you'd like to discuss further directly with me, otherwise I really appreciate any/all feedback I may receive on this thread!