Battery indicator shows full, but vacuum stops abruptly under load and flashes a single red bar or F1 icon

Safety first: Remove the battery before inspection. Do not puncture or open the battery casing.

• Step 1 – Compare runtimes: Fully charge the Dirt Devil vacuum, then run it continuously on low power until it stops. If runtime is significantly below the specification in the manual, the pack is worn.
• Step 2 – Check for swelling: Inspect the battery pack for bulging or deformation. If present, discontinue use immediately.
• Step 3 – Try another battery: If possible, test with a known-good compatible Dirt Devil battery. If performance returns to normal, your original pack is at end of life.
• Step 4 – Replace battery: Purchase and install a new genuine Dirt Devil lithium-ion battery pack. Avoid third-party packs that may not communicate correctly with the control board.
• Step 5 – Battery care: To extend life, avoid fully draining the battery regularly and store it partially charged in a cool, dry place.