Emergency lighting must be inspected periodically to ensure it functions properly during a power failure.
According to NEN 1010 and NEN 1838 standards:
Because batteries gradually lose capacity over time, the maximum recommended battery lifespan is typically 4 years. To remain compliant with regulations and safety standards, replacement is recommended during the 5th year.
Elfa supplies high-temperature NiCd and NiMH emergency lighting batteries that comply with relevant standards and include a 48-month warranty for 1-hour autonomy applications