Vacuum shows E12 and the LED ring flashes red; unit feels unusually hot

Safety: If the battery is extremely hot to touch, remove it carefully and place it on a non-flammable surface away from flammable materials.

• Allow cooling: Remove the battery and let it cool to room temperature. Do not place it in a refrigerator or freezer.
• Check vents: Inspect the battery casing and vacuum body around the battery compartment for dust buildup blocking cooling slots. Clean with a dry brush or compressed air (short bursts).
• Avoid heavy use in hot environments: Use lower power modes if operating in hot rooms or direct sunlight.
• Test after cooling: Once cool, reinstall the battery and test. If E12 appears again quickly under light use, the battery’s internal sensor or cells may be failing. Replace the battery pack.