The vacuum runs for only a few minutes on a full charge before shutting off.

Safety first: Remove the battery pack before inspection. Do not use or charge a swollen or leaking battery.

Step-by-step checks:

• 1. Fully charge the battery: Charge until the charger indicates completion. Then immediately test runtime in normal mode with a typical load.
• 2. Compare to expected runtime: Check the user manual for approximate runtime. If you are getting less than half of the rated time, the battery is likely worn.
• 3. Test in low power mode: If runtime is still very short even in ECO/low mode, capacity loss is severe.
• 4. Try another battery (if available): If a second Amazon Basics battery provides normal runtime, replace the original pack.

When to stop: Battery cells are not user-serviceable. Replace the battery pack with a compatible Amazon Basics replacement.