Vacuum will not start and displays E1 on the handle or main body LED display.

Safety first: Turn the vacuum OFF, remove the battery pack (if removable), and unplug the charger from the wall before inspecting anything.

• Step 1 – Check battery charge: Insert the battery into the original Cecotec charger. Confirm the charger LED turns on and begins charging. Leave it on charge for at least 3–4 hours, even if the indicator shows full quickly.
• Step 2 – Reseat the battery: Remove the battery and reinstall it firmly until you hear/feel a click. Inspect the battery rails and contacts on both the pack and the vacuum body for dust, burns, or deformation. Clean gently with a dry cloth.
• Step 3 – Try another outlet/charger: Plug the charger into a different wall outlet. If available, test with a known-good Cecotec charger of the same model to rule out a charger fault.
• Step 4 – Cool-down period: If the vacuum was used heavily before the error, let the battery cool for 30–60 minutes at room temperature, then try again. Over-temperature can trigger pack protection.
• Step 5 – Inspect for swelling or damage: If the battery pack looks swollen, cracked, or smells burnt, do not use it. Place it in a fire-safe area and contact a recycling center or Cecotec support.

If E1 persists after a full charge and reseating, the internal BMS or cells are likely damaged. Replacement of the complete battery pack is recommended; internal pack repair should be done only by qualified technicians.