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  "path": "/2026/03/23/tesla-patent-dual-battery-range-extender-trailer/",
  "publishedAt": "2026-03-23T16:21:33.000Z",
  "site": "https://electrek.co",
  "tags": [
    "News",
    "battery swap",
    "Tesla",
    "Tesla Cybertruck",
    "more…"
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  "textContent": "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.\n\nThe 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.\n\nmore…",
  "title": "Tesla patent reveals dual-battery system for trailer-mounted range extender"
}