Before you write to support
- The order number and exact listing title.
- A photo of the frame sticker with the model code.
- A photo of the display if there is an error code.
- What you already tried — charge time, charger, whether the battery was reseated.
Who is responsible
Warranty and returns belong to the seller on your receipt. The channel comparison explains the difference.
Safety first
Stop riding if a battery is swollen, hot without charging, leaking or smells sweet; if a charger gets too hot to hold; or if a brake lever reaches the bar.