Tesla patent reveals dual-battery system for trailer-mounted range extender
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<div class="feat-image"><img src="https://electrek.co/wp-content/uploads/sites/3/2026/03/tesla-patent-range-extender-trailer.jpg?quality=82&strip=all&w=1200" /></div><p>A newly published Tesla patent application describes a sophisticated dual-battery management system designed to integrate an auxiliary battery pack with a vehicle’s primary pack — including a configuration where the auxiliary battery lives inside a towed trailer.</p> <p>The patent was filed in August 2024, months before Tesla officially cancelled the Cybertruck’s bed-mounted range extender, suggesting the automaker’s engineering team continued developing the underlying technology even as the original product was being abandoned.</p> <a class="more-link" href="https://electrek.co/2026/03/23/tesla-patent-dual-battery-range-extender-trailer/#more-460726">more…</a>
<div class="feat-image"><img src="https://electrek.co/wp-content/uploads/sites/3/2026/03/tesla-patent-range-extender-trailer.jpg?quality=82&strip=all&w=1200" /></div><p>A newly published Tesla patent application describes a sophisticated dual-battery management system designed to integrate an auxiliary battery pack with a vehicle’s primary pack — including a configuration where the auxiliary battery lives inside a towed trailer.</p>
<p>The patent was filed in August 2024, months before Tesla officially cancelled the Cybertruck’s bed-mounted range extender, suggesting the automaker’s engineering team continued developing the underlying technology even as the original product was being abandoned.</p>
<a class="more-link" href="https://electrek.co/2026/03/23/tesla-patent-dual-battery-range-extender-trailer/#more-460726">more…</a>