Vacuum runs for only a few minutes on a full charge, then shuts off with no specific error code.

Safety first: Remove the battery before inspection.

• Fully charge battery: Charge the battery until the charger indicates full. Then immediately test runtime on low power and compare to the user manual specification.
• Try lower power mode: If runtime is acceptable on low but very short on MAX, the battery is weak but the vacuum is otherwise functional.
• Inspect battery for swelling: If the pack appears swollen or deformed, stop using it immediately and replace it.
• Replace battery: When runtime is significantly reduced, install a new OKP lithium‑ion battery pack. Dispose of the old pack properly.