I have an original Ninebot Mini.
After the firmware update to v1.4.1, the battery management system got corrupted and does not display anything. It shows v0.0.0
I downgraded my Ninbot app APK to 3.5.1, and it prompts out firmware update available to 1.3.1 but when l start updating, it fails because the BMS can't update as it timeout. V0.0.0 -> v.1.1.3.
Anyone knows how to fix this? It's still the original battery, just that it's locked to 10kmh, has a red led light at the back and is very uncomfortable to ride.