What Types of Battery Are Used in Emergency Lighting?
Emergency lighting utilizes various types of batteries, with the primary ones being: 1. Lead-acid batteries : Historically prevalent in self-contained emergency lighting fixtures like twinspots, these were also extensively used in central battery systems. However, their usage in emergency lighting beyond these specific applications has significantly diminished in recent times. A twinspot emergency light fitting. Till recently, most of these used sealed lead acid batteries, but other chemistries are now being used. 2. Nickel-cadmium (NiCd) batteries are prevalent in stand-alone emergency lighting fixtures and emergency conversion kits. Despite cadmium being highly toxic and among the six substances prohibited by the EU's RoHS Directive, an exemption exists for emergency lighting batteries. Until recently, there have been limited viable alternatives, hence the continued use of NiCd batteries in this context. A stand-alone emergency exit sign. Most of these use nicke