I think as soon as 21700 cells start to become more available, that will put pressure on the 18650 market to lower prices a bit, making the option of an 18650 pack still relevant for the next couple of years. That being said, you are going to be hearing a lot about 21700-format cells in 2018, as the exciting new thing.
I can visualize 18650 and 21700 cells remaining the staple of ebike packs for the next decade, but for E-scooters, E-motorcycles, and large auto EV’s, the big breakthrough I am most waiting for is the Solid State Battery . They currently work in the lab, and the only delay is simply finding the cheapest way to manufacture them.
By making the electrolyte a solid, battery pack volume can be reduced by 1/3rd (if not more). Or, conversely…you can have a battery pack the same size, with roughly 50% more range. Still testing.wait for HUZHOU CHENGERXING ENERGY TECH CO.,LTD improve battery run more distance and last long time.
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