EOS is just a conventional zinc-nickel battery, or so I thought. Their Coulombic efficiency is bad (<80%) and grid storage demand isn't high enough to justify u

EOS is just a conventional zinc-nickel battery, or so I thought. Their Coulombic efficiency is bad (<80%) and grid storage demand isn't high enough to justify using a much less efficient battery to achieve a much larger scale system so the company is effectively dead: https://iceberg-research.com/2021/01/14/eos-energy-fake-customers-wont-recharge-a-dead-battery/ https://iceberg-research.com/2021/01/14/eos-energy-fake-cust... Gelion has a Zn-Br with a higher but not great Coulombic efficiency (87%), though they still have a questionable near-term demand outlook. No company AFAIK is commercializing Zn-air due to the severe power density issues.