If that was one of those ELM327 dongles, yes they have 12V and are known to drai... | Hacker News

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smilespray 19 days ago | parent | context | favorite | on: Malware infects Android-based automotive head unit...

If that was one of those ELM327 dongles, yes they have 12V and are known to drain your battery. They're only meant for short diagnostic runs.

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