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When you mention "battery firmware", are you referring to the settings in flash that you can change regarding safety cut-off points, etc?

Or were you actually able to make the battery's IC execute arbitrary code?

In my mind, firmware only refers to executable code. Curious though if there is a way to actually run code on those guys.

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They called it a battery firmware update, but they meant the pages of settings you can change in flash. I was able to dump raw memory from the chip, but I could never figure out which generic microcontroller the battery controller had been built on top of (at least I assumed it had been built that way), so running code was a nonstarter.

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