Vacuum displays a 'Battery' icon or message; machine will not run or runs only for a few seconds before stopping.

Safety: Disconnect the charger before handling the battery. Do not open the battery pack or expose it to heat or water.

• Check seating: Remove the battery and refit it firmly until it clicks. On click‑in batteries (V11, V15), ensure the latch fully engages.
• Fully charge: Place the vacuum on the charger for at least 3.5–4.5 hours (depending on model) until the indicator shows full charge.
• Test runtime: Run the vacuum in Eco/Normal mode. If it stops within 1–2 minutes repeatedly, the battery is likely worn.
• Inspect charger and contacts: Check for bent or corroded contacts on the battery and charger. Clean gently with a dry cloth.
• Replace battery: If the Battery warning persists and runtime is poor, replace with a genuine Dyson battery pack specified for your model. Dispose of the old battery at a proper recycling facility.