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File: 21700bank.jpg (87 KB, 640x853)
87 KB JPG
Does anyone make 2x21700 or 4x21700 battery banks with interchangeable batteries for charging your gear? It seems like the only thing out there are 1x.
>>
>>2866935
This one works both ways I believe.

https://convoylight.com/products/yonii-pd2-charger-for-18650-21700-lithium-battery-black-color?data_from=collection_detail&spm=collection_detail.116035.collection_detail-2134596.2.



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