Watt's next for batteries? It'll be more of the same, not longer life, because physics and chemistry are hard

Lithium-ion had a lucky break early on. Successors will need billions of dollars to catch up – if they don't flame out first

Feature  "There are liars, damned liars, and battery guys" – or some variation thereof – is an aphorism commonly attributed to US electro-whizz Thomas Edison.…