It can be dangerous if batteries get wet, particularly certain types of batteries. Here are some considerations:
Water and Standard Batteries (Non-Rechargeable): If standard alkaline or carbon-zinc batteries (commonly used in household devices) get wet, it can cause them to corrode. The corrosive chemicals inside the battery can leak out and damage the contacts or other components of the device. While this corrosion can be inconvenient and damaging to the battery and device, it generally does not pose a significant safety risk unless the battery is ingested, which can be harmful.
Water and Lithium Batteries (Rechargeable): Lithium-ion or lithium-polymer batteries, commonly found in smartphones, laptops, and other electronic devices, can be more hazardous if they get wet. Water can cause a short circuit within the battery, leading to overheating, release of flammable gases, or even a fire. It is crucial to keep lithium batteries dry and prevent them from being exposed to moisture.
In general, it's best to avoid exposing any type of battery to water or excessive moisture. If a battery does come into contact with water, it is recommended to remove it from the device, dry it thoroughly, and dispose of it properly if it shows signs of damage or leakage.
Additionally, it's important to follow manufacturer guidelines and precautions regarding the handling, storage, and disposal of batteries to ensure safety and prevent potential risks.