<ul><li>An auxiliary battery is a small additional battery used in EVs to power supplementary equipment like lights, music systems, and navigation.</li><li>An auxiliary battery is charged automatically when the motor runs, similar to how the battery in an IC engine vehicle gets charged.</li><li>In contrast, a traction battery is a large battery in EVs that stores energy, runs the motor, and powers heavy equipment like the air conditioner and heater.</li><li>Traction batteries are typically lithium-ion batteries with high energy density, while auxiliary batteries are usually lead-acid but can also be lithium-ion.</li></ul>

What Is An Auxiliary Battery?

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