* Batteries can emit hydrogen gas. Hydrogen gas is a flammable gas that can be produced when batteries are being charged. If there is an open flame nearby, the hydrogen gas could ignite and cause a fire or explosion.
* Batteries can contain flammable materials. Batteries contain flammable materials, such as lithium-ion and lead-acid. If these materials are exposed to an open flame, they could catch fire and cause a fire or explosion.
* Batteries can be damaged by heat. Heat can damage batteries and reduce their lifespan. If an open flame is too close to a battery, the battery could overheat and be damaged.
For these reasons, it is important to keep open flames away from batteries that are being charged.
