new type of Li-ion battery.....uses salt water. first prototypes show 5x capacity compare to standard Li-ion batteries. http://www.technologyreview.com/energy/22926/ http://www.polyplus.com/index.htm The Li-Seawater battery is a primary battery system intended for marine applications. The theoretical energy desity for Li-Seawater is 9000 Wh/kg and 4900 Wh/l, and PolyPlus expects to deliver cells with practical energy densities of 4000 Wh/kg and 2000 Wh/l. so 25 kg can store 100 kw...... enough for poleski... less 40 kg swapping engine to motor......... plus sealed motor.......... who says it is not close future?
mabe on flat water but in the surf dont batteries die young? if so you'd be replacing them frequently and at a cost that would tear most peoples wallets a new arse hole...not to mention the initial cost the ski. also it is extreamly unlikely that a poleski version would every be made cause they wouldnt sell enough of them.
