What Types of Battery Are Used in Emergency Lighting?
Emergency lighting relies on various battery types, with the main ones being: 1. Lead Acid : These were commonly used in self-contained emergency lighting fixtures, such as twinspots, and are still widely used in central battery systems. Outside these applications, lead acid batteries are now rarely used in emergency lighting. - Example: A twinspot emergency light fitting. Until recently, most of these used sealed lead acid batteries, but other chemistries are now being used. 2. Nickel Cadmium (NiCd) : Despite cadmium being highly toxic and banned by the EU’s RoHS Directive, an exemption is in place for emergency lighting batteries due to limited alternatives. NiCd batteries are widely used in standalone emergency lighting fixtures and emergency conversion kits. - Example: A standalone emergency exit sign with nickel cadmium (NiCd) batteries inside the fitting. - Example: NiCd batteries in conversion ki...