You should always follow these health and safety rules when working with a battery
Follow the instructions written on a battery.
There is an electrolyte in a battery; there is also a sulphuric acid. Therefore, while handling the battery, keep the flame and cigarettes away from it.
Always keep electrolyte, sulphuric acid, and distilled water away from the children and sunlight. Tightly close them.
Since the battery contains an electrolyte, be careful. The electrolyte of the battery is in a liquid form. If it gets into your eyes, wash with a clean water for 15 mins and seek a medical attention.
To prevent your eyes from electrolyte, put a glass, as well as wear gloves
Never charge your battery for more than 48 hours. The place, where you charge your battery should be open.