To safely use lithium-ion batteries, it is important to follow several key guidelines. These practices help extend battery life and prevent fires or accidents. The safe usage instructions are as follows:

1. Prevent Overcharging
   Be careful not to overcharge the battery. Overcharging can damage battery cells and increase the risk of fire or explosion.
   Most lithium-ion batteries have a built-in Battery Management System (BMS) that automatically stops charging when overcharge is detected. However, it is advisable to regularly check the battery status during charging.

2. Prevent Overdischarging
   Overdischarging occurs when the battery voltage drops too low, causing damage. To avoid this, charge the battery promptly when the remaining capacity is low.
   Severe voltage drops can cause internal short circuits and other issues.

3. Use Within Proper Temperature Range
   Lithium-ion batteries’ performance deteriorates in high or low temperatures, increasing the risk of overheating or fire.
   The ideal operating temperature is generally between 0°C and 45°C, and the ideal charging temperature is between 10°C and 45°C. Extreme temperatures increase the risk of damage and accidents.
   Ensure proper ventilation around the battery and avoid direct sunlight or high-temperature environments.

4. Prevent Physical Damage
   Avoid shocks or exposure to water. Physical damage can cause internal short circuits or overheating.
   If the battery casing is damaged or impacted, stop using it immediately and have it inspected by a professional.

5. Utilize Battery Management System (BMS)
   Most lithium-ion batteries include a BMS to automatically manage charging, discharging, and temperature.
   Check that the BMS functions properly and seek professional inspection if errors occur.

6. Check Charger and Battery Compatibility
   Use genuine chargers and verify compatibility between the battery and charger. Low-quality or incompatible chargers can cause overcharging or poor charging.
   Always confirm that the battery and charger voltages match.

7. Regular Inspection and Cleaning
   Regularly inspect the battery and keep charging ports and terminals free of dust or foreign substances, which can cause short circuits.
   Check for abnormalities in battery condition, cell imbalance, or external damage.

8. Storage Precautions
   When storing batteries for long periods, do not fully discharge them. Store at about 50%-70% charge.
   Store in a cool, dry place, avoiding direct sunlight, high temperatures, and contact with metal objects.

9. Check Battery Replacement Cycle
   Batteries degrade over time, with reduced capacity and performance. Regularly check battery life and consider replacement as needed.
   Lithium-ion batteries typically begin to degrade after 500 to 1,000 charge cycles.

10. Response to Battery Overheating
    If the battery overheats or emits unusual odors, stop using it immediately and move it to a safe place. If smoke or fire occurs, use a fire extinguisher or call the fire department.

Lithium-ion Battery Safety Checklist

1. Use genuine chargers

2. Prevent overcharging and overdischarging

3. Avoid high and low temperature environments

4. Prevent physical damage (impact, external pressure)

5. Check Battery Management System (BMS)

6. Monitor charging status and conduct regular inspections

7. Confirm battery replacement timing

Following these safety rules will help extend lithium-ion battery life and prevent accidents.