Shenzhen Yihui Lighting Co.,Ltd
Home >  News > Industry News > 

How Often Should an Emergency Light Be Charged and Discharged?

How Often Should an Emergency Light Be Charged and Discharged?1 How Often Should an Emergency Light Be Charged and Discharged?Feb 02, 2025

  How Often Should an Emergency Light Be Charged and Discharged?

  Regular charge - discharge cycles are important for maintaining the performance and lifespan of an emergency light's battery.

  For Ni - Cd and Ni - MH battery - powered emergency lights, it is recommended to perform a full charge - discharge cycle at least once every 3 - 6 months. These types of batteries suffer from a phenomenon called "memory effect." If they are repeatedly charged and discharged to only a certain level, they "remember" this partial charge - discharge pattern, which gradually reduces their capacity. By fully discharging the battery (down to the manufacturer - specified cut - off voltage) and then fully recharging it, the memory effect can be minimized. For example, a Ni - Cd - based emergency light should be allowed to discharge until the light dims significantly (indicating low battery voltage) and then charged for the recommended time, usually 12 - 14 hours.

  Lithium - ion - powered emergency lights have different requirements. Li - ion batteries do not suffer from the memory effect as severely as Ni - Cd and Ni - MH batteries. However, they still benefit from periodic deep discharge and recharge cycles. A good practice is to perform a full charge - discharge cycle every 6 - 12 months. Over - discharging a Li - ion battery can be more damaging than over - discharging Ni - Cd or Ni - MH batteries, so it is crucial to follow the manufacturer's guidelines regarding the minimum safe discharge voltage.

  In addition to these periodic cycles, it is also a good idea to test the emergency light's functionality by allowing it to discharge during a short - term power outage or by using a test button (if available) on a monthly basis. This not only helps to keep the battery in good condition but also ensures that the emergency light will work as expected when a real emergency occurs.

Do Emergency Lights Need to Be Plugged in All the Time?

Do Emergency Lights Need to Be Plugged in All the Time?

How Long is Appropriate for Charging a Rechargeable Emergency Light?

How Long is Appropriate for Charging a Rechargeable Emergency Light?