Vacuum shuts off only when the battery is physically wiggled or removed; power is otherwise constant.

Safety first: Remove the battery before inspecting the slot.

• Clean battery slot: Remove dust and debris from the battery receptacle using a dry brush or compressed air.
• Inspect latch: Ensure the battery latch clicks firmly and holds the pack securely.
• Check terminal tension: Gently press the metal contacts inside the slot (with a non-metallic tool) to confirm they are not bent back.
• Test with another battery: If only one battery is loose, its housing may be worn and should be replaced.

A secure mechanical and electrical connection is essential; replace worn batteries or have the tool's battery terminals serviced.