2X is a stretch.
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Looking at the latest presentation on page 25 Electrovaya equates 350Wh/kg to 750 WH/L. The infinity cell is 250Wh/kg so solving for the Wh/L we get 535Wk/l for the Infinity cell. With that information and looking at page 27 where Electrovaya is testing the new SSCell expecting 1000-1500Wh/L. If we take the middle of the range 1250Wh/l and solve for the WH/Kg we get 585WH/kg which is a little more than twice the 250WH/kg of the current Infinity battery cell.