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New solid state battery charges in minutes, lasts for thousands of cycles
(www.pv-magazine.com)
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combustion engines get better every year too. Engineers love optimizing what's already there.
A breakthrough by it's nature isn't just a marginal improvement.
A breakthrough often enables more than just a marginal improvement in theory. However building real world, mass produceable products based on the science is not an instant process, and very commonly manifest as a trickle rather than all at once.
LED lighting has changed the world, when they first came out in 1962 as faint ir emitting devices, they were quite useless for most of the purposes we know them for today.