Now that Tesla has officially announced the new cell is 21mm by 70mm (21-70 in their naming, 21700 in conventional battery parlance), I'm opening a thread to discuss any known details of it: capacity, discharge rate, weight, etc. Here's what we know currently: almost nothing. Samsung recently announced a similar 21700 cell, aimed at the rapidly growing e-bicycle market. The European e-bicycle market alone is around 1.5 million units annually, consuming somewhere around 0.6 gWh of cells, and has been growing at 20 percent compounded for almost a decade. The Samsung 21700 cell is nominally rated at 4.750 Ah, is listed at 3.6 volts nominal, has a max discharge rating of just under 2C, and claimed to weigh 75 grams. Most 18650s are in the range of 45 to 48 grams. Straubel or Musk somewhere along the way mentioned the new 21-70 had 40 percent more energy than the prior 18650 cell, which might put it around 4.8 Ah as well, if they were talking energy and not specific energy. Does anyone know anything else?