The use of batteries is now a major component in many industries, ranging from the need to supply permanent (uninterrupted) power to IT/communication facilities to the storage of energy in power generation facilities (especially renewable). Hazards associated with the use of batteries include constant gas emissions during recharge cycles as well as the potential for fire. For example: the electrochemical reaction associated with the charging of lead-acid batteries generates highly flammable hydrogen gas (off-gassing), that has the potential to create explosion hazard if not managed properly, whereas, charging of lithium-ion batteries can generate excessive heat that might result in thermal runaway and the evolution of toxic gases (carbon monoxide, carbon dioxide, etc.), presenting a fire and explosion risk. Early smoke detection and reliable monitoring for explosive and toxic gases, forms therefore, an essential part of the total safety infrastructure for a battery-charging room.