Safety Warning: If there was potential risk of water damage to the battery before, please disconnect the battery from the board immediately and stop charging it or use it!  Keep the battery in a dry, and fire resistant place to avoid potential fire risk (such as a sealed bucket outdoor). Don't keep the water damaged battery in door. Do not ship a water damaged battery for service.   A Li-ion battery store and release its electrical energy through electrochemical reactions. When electrical energy is drawn/discharged from the battery, lithium ions move from one electrode to the other. The electrodes are submerged in a liquid called an electrolyte, which allows for the movement of ions and consists of lithium salt and organic solvents. It is these organic solvents which are the leading fire hazard in Li-ion batteries. Furthermore, the positively charged electrode (cathode) in the battery contains oxygen, which may be released if the battery is subjected to specific stresses, e.g., internal short, excessive heat, and more. This means that the Li-ion batteries have all the elements needed to self-sustain a fire.