brown flex circuit, rectangular, on top of a large number of green NiMH cells.

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   Tube❄️Time (tubetime@mastodon.social)'s status on Tuesday, 13-May-2025 05:51:37 JST Tube❄️Time

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   ok wow that's unexpected. there's a flex circuit that sits on top of the cells inside the battery! it connects to not one, but TWO thermistors, and it has some funny bits of metal soldered on.