How does discharging a battery significantly faster than its standard rating affect the total energy delivered?

Answer

Less than the rated Ah total energy will likely be delivered.

Discharging at high currents (high C-rates) leads to greater internal resistance losses, which manifest as heat and cause the voltage to drop faster, reducing the total extracted capacity before the low-voltage cutoff is hit.

How does discharging a battery significantly faster than its standard rating affect the total energy delivered?

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Battery capacity and voltage explained - YouTube

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