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Automotive glossary

Usable Battery Capacity (Net Capacity)

Usable capacity is the part of the battery that can actually be used.

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What is Usable Battery Capacity (Net Capacity)?

Gross capacity includes buffers. Buffers protect the battery. Manufacturers state both values. For example, a battery advertised with a gross capacity may have several kWh reserved as a buffer that the driver cannot access. The buffer at the top reduces stress when charging to 100 percent, and the one at the bottom protects against deep discharge.

How it works

The BMS restricts use of the top and bottom.

Why it matters for your car

Compare net values. Buffers may shrink over time.

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