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Paralleling Battery Packs
I am definitely going to try it myself! Now just need to order a bms!

On a different note... what is the best way to parallel 15s packs? Is there a simple wiring adapter y-type plug out there already?
For up to 14s (That is more a standard...) you can get Y connectors in terms of balancing wires. You can see them in the video I attached.
Im not sure what you can find for 15s. But with that said yoiu can have smaller contacts but more
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You can easily rig up your own Y-cable or bus bar blocks to connect each pack. For the balance leads, I typically use some sort of multi-pin quick disconnect like those seen in automotive, or even a old ATX power supply harness can be used to make a "y-cable"

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