Which metric allows for a universal comparison of stored energy across batteries with different internal voltages?

Answer

Watt-hours (Wh)

Watt-hours (Wh) measure the actual energy capacity by incorporating both the charge capacity (Ah) and the nominal voltage (Wh = Ah x V). This makes Wh a universal standard for comparison regardless of the underlying cell voltage.

Which metric allows for a universal comparison of stored energy across batteries with different internal voltages?

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Battery capacity and voltage explained - YouTube

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