Lithium ion batteries may be more expensive than PHES, but they have other advantages such as (which is correct?):

Question

Lithium ion batteries may be more expensive than PHES, but they have other advantages such as  (which is correct?):

Answer

They can be built at very large scale and can discharge power for many hours

Answer

They can be built at a broad range of sizes including very small, and have fast response rates

Answer

Their performance does not change with time - they remain as efficient on the last day as the first.

Answer

They have very long lifetimes, lasting as long as 50 years.

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