Batteries For Emergency Lights and Exit Signs

Table of Contents

• Types of Batteries Used
• Sealed Lead-Acid vs. Nickel-Cadmium
• Battery Voltage and Capacity
• Testing and Maintaining Batteries
• When to Replace Batteries
• Battery Replacement Steps
• Battery Terminal Types
• Exit Sign Batteries
• Conclusion

Types of Batteries Used in Emergency Lights

Emergency lights and exit signs rely on rechargeable batteries, typically either sealed lead-acid (SLA) or nickel-cadmium (NiCad).

• Sealed Lead-Acid (SLA): Used primarily in battery backup emergency lights.
• Nickel-Cadmium (NiCad): Common in compact emergency fixtures.

Sealed Lead-Acid vs. Nickel-Cadmium

Read more: Detailed Battery Comparison

Battery Voltage and Capacity

Batteries usually range from 6V to 24V. Always match voltage exactly when replacing batteries.

Testing and Maintaining Batteries

Test batteries monthly and annually per OSHA guidelines. Modern fixtures may feature automatic self-testing.

When to Replace Batteries

• Failed tests
• Dim lamps
• Physical battery damage (leaking/swelling)

Battery Replacement Steps

1. Open Fixture: Remove screws to open housing.
   
2. Identify Battery: Locate battery and disconnect wires carefully.
   
3. Replace Battery: Match voltage, type, and connector style, then install.
4. Test Unit: Press the test button after replacement.

Battery Terminal Types

• Faston Tabs: Common in SLA batteries, easy to disconnect/reconnect.
  
• Wire Leads/Plugs: Common in NiCad packs, usually snap connectors.

Types of Exit Sign Batteries

Exit signs typically use NiCad or SLA batteries for backup. Non-electric options like photoluminescent or tritium signs require no batteries.

Detailed info: Emergency Lights and Exit Signs Batteries

Conclusion

Replacing emergency batteries is straightforward and essential. Regular maintenance ensures fixtures function reliably in emergencies, maintaining compliance and safety.