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3:43 PM
https://www.amazon.com/s?k=JBL-Waterproof-Portable-Bluetooth-Speaker
Just took the words in the URL and searched it.
Maybe they think batteries literally need to be stacked in series or side-by-side, and not just different wiring.
 
Series/Parallel is the shitty topology puzzle all EE's must learn, but some people have hard times "seeing" it.
 

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