Do you know the type of JST 10pins used in a BMS. I was thinking of just buy the male version, as on the BMS, and connect to it. So I wont’ need to cut the current jst connector in case I wantot come back to normal BMS.
Yeah the sales Aliexpress are awesome!
That’s the main reason I wanna make an ebike 
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Yes, you can use the same wires as the rest of the balance wires.
Some Lipo batteries come preconfigured with 11 pins on a 10S battery, because it includes the additional ground pin.
Most BMS’s don’t need the ground pin because they are already pulling the ground pin from the inline negative terminal of the battery, which is how they switch the power on and off incase of faults or shorts. But in this case it has no inline negative, so it needs the additional pin.
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My collegue made an ebike last year and at the time we were looking at that kit. We ended up buying antoher one and it is still going strong. 800 Euro full kit for 60khm bike ahahahah Nice!
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