USB and electrical grid: what they have in common

1. Step 1. USB — evolved into — USB-C. A new USB connector.
2. Step 2. USB-C — is used in — Power bank. The connector.
3. Step 3. Power bank — is made of — Lithium. The cells are lithium-ion.
4. Step 4. Lithium — is material for — Grid battery storage. The cells are lithium-ion.
5. Step 5. Grid battery storage — is part of — Electrical grid. Storage balances the grid.

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