battery pack with two circuit boards on the front, including LEDs, resistors, transistors, and a large chip.
https://files.mastodon.social/media_attachments/files/114/496/726/150/900/481/original/8c6a039878f60e37.png
i pulled the front panel off, and you can see there's a good amount of circuitry in there. but let's disassemble the whole battery pack.
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