I cannot stress enough that we are talking about radically different RATES. I would think an engineer would understand the importance of RATE. If it takes more than 20 years don't you think the technology will advance? I showed already a couple times how tech is advancing. You simply ignore that. Why? As I noted in the USGS Li mining report, there is at least one company that is doing right now. That means it is not thermodynamically impossible. It CAN BE DONE. This is where economics kicks in. If there is demand and the prices are correct there's a lot that can be done. Not to mention the amount wasted on people like you and your electronics! As I noted before if it was ONLY a matter of energy density we'd all be driving Ford Nucleons (you can go ahead and google that or ignore it again).