Emergency Light Battery Replacement: What You Need to Know about

13 Oct, 2022

By hqt

emergency light battery

What does it mean to replace the battery in an emergency light?

An emergency light battery replacement is a rechargeable power source for these lights, which are required in sizable housing developments, factories, and commercial structures. When there is an event of an issue, building residents face electricity outage or lights fail, therefore building maintenance is crucial to maintaining emergency or exit lights so they are prepared for the worst-case circumstances. Keeping the backup battery packs safe is an integral part of that job.

How to check the emergency light batteries?

  • The batteries should be maintained for the illumination of darker areas by routine testing of the lights. A monthly inspection is therefore, required for each emergency lighting system.
  • The test should be conducted every month to ensure that the lighting system operates effectively while limiting any damage to the system's components, including the lights and batteries.
  • A building must have enough lighting so people can leave and see firefighting equipment, claims the statement. On the casing of every emergency light is a test button.
  • Press and hold this button for around 30 seconds while ensuring your lights don't go off or dim. If your light does fade or some of the bulbs aren't working correctly, you should hire a technician to fix it as soon as possible. The battery needs to be changed every four years, although occasionally, they don't.

What conditions might cause a battery in an emergency light to last less time than it should?

An emergency light's battery typically lasts three to four years. The following factors might cause premature battery failure:

  • Extremely hot weather outside
  • Storing the emergency luminaires for a long time after purchase and before installation.
  • It requires temperatures below 0°C to store emergency batteries in a discharged condition for an extended period, such as when making LiFePO4 batteries.
  • Installing emergency lights instead of separate batteries or emergency lighting systems results in further financial savings and aesthetic benefits.

Factors that can affect the lifespan of an emergency light battery:

Emergency light batteries are essential components of emergency lighting systems, providing illumination in case of power outages or emergencies. The lifespan of an emergency light battery can be affected by various factors, including temperature, humidity, and usage. Here are some details on how these factors impact battery life:

Extreme Temperatures:

Higher or lower than normal operating temperatures can negatively impact the lifespan of emergency light batteries. High temperatures can lead to increased chemical reactions within the battery, causing it to degrade faster. In contrast, low temperatures can slow down chemical reactions, leading to reduced battery capacity and performance.

To maximize battery life, it is essential to store and operate batteries within the recommended temperature range specified by the manufacturer.

High Humidity Levels:

High humidity levels can lead to corrosion of battery terminals and internal components, causing reduced battery life. Moisture can also lead to short-circuits or increase the rate of self-discharge. To prevent these issues, it is essential to store and operate emergency light batteries in a dry and well-ventilated environment with controlled humidity levels.

Frequent Usage:

Frequent usage, deep discharging, and high current demands can impact the lifespan of emergency light batteries. Discharging a battery too deeply and frequently can lead to increased internal resistance, reduced capacity, and a shorter overall lifespan.

It is important to use emergency light batteries according to the manufacturer's guidelines and ensure they are adequately charged and maintained to prolong their life.

Manufacturer's Built Quality and Type:

The quality and type of battery used can significantly impact its lifespan. High-quality batteries typically have better performance and longer lives than lower-quality counterparts.

Additionally, certain types of batteries, such as lithium-ion, generally have longer lifespans than other types, such as nickel-cadmium or lead-acid batteries. Choosing the right type and quality of battery for your emergency lighting system is essential for ensuring long-lasting performance.

Age and Shelf Life:

Even when not in use, batteries degrade over time. The rate of degradation can be affected by factors such as temperature and humidity, as mentioned earlier. It is important to consider the age and shelf life of batteries when purchasing or installing them in emergency lighting systems to ensure optimal performance and longevity.

emergency light battery replacement

The value of replacing the emergency light battery:

Replacement of the emergency light battery is essential since emergency lights need batteries to operate. Over time, batteries lose their ability to hold a charge and must be replaced. It's important to know when to change the batteries in emergency light battery replacement.

When you need it most, your emergency light cannot work if the battery isn't changed. Depending on the battery type, how often the light is used, and other factors, the batteries could need to be changed every two to three years.

However, if the light is used often or is exposed to bad weather, the batteries might need to be changed more frequently. Your emergency light could not function because the battery is dead, so you should get a new one.

How well do lights function in an emergency?

Emergency lighting must provide sufficient illumination along the escape path in the event of a mains power failure so that building occupants may do so safely. It lights up the area during an emergency so people may escape a building or particular area.

Most construction rules include it as a necessary step in ensuring the safety of human life. Emergency lighting is crucial for several reasons. They aid in making it safe for people to evacuate a building in an emergency and give first responders guidance.

Why is it possible to replace the batteries in emergency lighting?

The emergency lighting batteries are crucial because they keep the lights on during a power outage, enabling employees and clients to find fire exits and evacuate the building safely. They also make sure that equipment is labeled, such as fire extinguishers, so that the trained staff members have access to the equipment needed to put out a fire and prevent it from spreading.

  • Batteries power the emergency lights and exit signs. These rechargeable batteries continually maintain the readiness and performance of the emergency light. The electronics of the emergency light charge the battery and keeps it charged.
  • Before changing a rechargeable battery for emergency illumination, you should check the manufacturer's instructions because it could or might not be feasible.
  • Depending on your emergency light battery replacement type, remove the battery compartment lid, the lens, or the exit faceplate. Next, remove the old battery and swap it out for a new one compatible with the emergency lighting model.
  • Batteries made of sealed lead acid must always be maintained upright when being removed and replaced. Even though the battery is still in good condition, you are obligated by law to replace the emergency light battery pack every four years.
  • The maintenance person or the electrician could believe that changing your batteries is their responsibility. But it's really relatively simple, as you can see. It doesn't need to be installed by a certified electrician, and no knowledge of wiring or electricity is necessary.

Safety precautions that should be taken when replacing an emergency light battery.

  • Disconnect power: Always disconnect the power source before starting any work on the emergency light system to avoid electrical hazards.
  • Wear personal protective equipment (PPE): Use appropriate PPE, such as gloves, safety glasses, and closed-toe shoes, to protect yourself from potential hazards while handling batteries.
  • Follow manufacturer guidelines: Consult the manufacturer's instructions for specific guidelines on battery replacement, handling, and disposal.
  • Use the correct battery type: Ensure that you are using the correct battery type and specifications recommended by the emergency light manufacturer to avoid potential damage or malfunctions.
  • Inspect the battery compartment: Before installing the new battery, check the battery compartment for any signs of corrosion, damage, or loose connections. Clean and repair as needed.
  • Handle batteries with care: Batteries, especially lead-acid types, can be heavy and contain hazardous materials. Handle them with care to avoid dropping or damaging them.
  • Avoid short-circuiting: Keep the battery terminals covered or protected during the replacement process to prevent accidental short-circuiting.
  • Test the emergency light system: After replacing the battery, test the emergency light system to ensure proper functioning and that the battery is correctly connected and charging.
  • Regular maintenance: Perform regular maintenance and inspections of the emergency light system to ensure optimal performance and prevent potential issues.


It is essential to routinely check the emergency light batteries. Some batteries may need to be replaced sooner, even though the majority have a life expectancy of three to five years. If you notice that your emergency lights are not lasting as long or working as well as they used to, it is probably time to change the battery. It is advantageous in comparison to conventional batteries.

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