Had been searching for modestly priced rebuilt packs in the US with no success. Finally ended up doing a pack rebuild on my own. Found the exact OEM 18650 LG Cells out of Korea for $230USD for the 60 cells. Pure nickel stripping and cell holders cost another $30, but was able to reuse the original 15S2P BMS's which both reset nicely. I already had the spot welder. The "new" LG cells were from a 2016 mfg batch and equally charged at 3.7Volt give or take .04
I have been running the pack for six weeks now. Working like a new pack - of course it almost is new!
Just here to say that rebuilding a Ninebot battery pack can be done by "carefully" following guidance found online and Youtube. Learn from other people's mistakes and successes.
I did have someone standing by with fire extinguisher and I wore gloves, eye protection and full face shield while working with the packs. Spot welding batteries can go smoothly and easy until IT DOES NOT! I had no problems , but took my time and checked and double checked polarity, wiring positions, placement BEFORE every weld.
I will rebuild all my packs from now on, but will try to maintain the same "sense of danger " as I did doing the first pack.
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