Lithium-ion batteries contain highly toxic and flammable chemicals which are generally well controlled. However if controls fail or a battery is damaged the battery can very quickly erupt into a fire of intense heat with toxic smoke and fumes being emitted, which is extremely difficult to extinguish.
Therefore, with the dramatic rise in the number of devices using rechargeable Lithium-ion batteries, workplaces are required to take action to minimise risk of injury that occurs when a Lithium-ion battery fails.

This workplace safety poster is one in a series of six posters designed to help workplaces inform workers of their policies and procedures to help ensure Lithium-ion battery safety. This poster warns of the dangers associated with Lithium-ion battery fires, and lists the immediate steps workers should take if a Lithium-ion battery/device does catch fire. 
(Emergency Services Number according to the country. E.g., 911 for US posters.)

Please note that this information is general in nature, so workplaces should ensure it aligns with the guidance and requirements of safety regulators and councils in their location.