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 a broad range of sizes including very small, and have fast response rates

Answer

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

Answer

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

Answer

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

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