Many professional-grade rechargeable work lights are compatible with 18V-21V lithium batteries from brands such as DeWalt, Makita, Milwaukee, and Bosch. These batteries are widely used in power tools and can provide strong endurance, but proper management and use are essential to ensure safety and extend battery life.

In daily use, it is recommended to use the brand's official charger first. Lithium batteries from brands such as DeWalt and Makita are usually equipped with dedicated smart chargers that can provide overcharge and overheating protection to avoid battery damage. At the same time, incompatible third-party chargers should be avoided to prevent battery overheating or short circuits. In addition, lithium batteries should not be fully discharged before charging. It is recommended to charge when the remaining power is 20%-30%, which can effectively extend the battery life. When the battery power of the work light is low, the brightness may decrease. At this time, it should be replaced or charged in time. Although many brands of lithium batteries have overcharge protection, it is still recommended to remove the battery in time after the green light of the charger is on to avoid long-term overcharging.

The charging environment is also an important factor affecting battery performance. When charging, the ambient temperature should be kept between 5℃-40℃, and charging in high temperature (>45℃) or low temperature (<0℃) environments should be avoided. At the same time, charging should be avoided in direct sunlight, in a car or in a high humidity environment to prevent the battery from overheating or getting damp.

For the storage and maintenance of the battery, it is recommended to keep the battery power between 50%-80% during short-term storage (a few days to a few weeks), avoid storing it in a fully charged or fully discharged state, and place it in a dry and cool place away from water, heat sources and metal objects. If stored for a long time (more than 1 month), it is recommended to charge and discharge the battery once every 3 months to prevent deep self-discharge of the battery from causing it to be scrapped. The storage temperature should be controlled between 10℃-30℃ to avoid overcooling or overheating that affects battery performance. In addition, the battery should be disconnected from the tool during storage to prevent a small current from continuously consuming the battery. In order to ensure battery performance, the metal contact points of the battery should also be checked regularly. If there is dust or oil, wipe them with a clean dry cloth or alcohol cotton. At the same time, avoid contact with conductive objects such as keys and screwdrivers to prevent short circuit damage to the battery.

During use, safety precautions should not be ignored. First, overload should be avoided. Long-term use in high-brightness mode may cause the battery to heat up. It is recommended to reduce the brightness appropriately or use it intermittently. If the lamp body or battery is abnormally hot, it should be turned off and checked immediately. Secondly, the battery terminals must not contact objects such as keys, screwdrivers, metal dust, etc. to prevent short circuit and fire. The original battery cover or storage box can be used for protection during storage. If the battery has abnormal conditions such as odor, bulging, hotness, or inability to charge, it should be stopped immediately and handled in a safe environment.

Although some DeWalt and Makita batteries have certain protective designs, they still need to be waterproof and drop-proof. Avoid contact between the battery and water. If water is accidentally intruded, the power supply should be disconnected immediately and thoroughly dried. Use it after confirming that there is no risk of short circuit. At the same time, the battery should be prevented from being hit violently or falling from a height, which may cause damage to the internal structure of the battery, affect its life, and even cause safety hazards. If the battery shell is found to be cracked or deformed, it should be stopped immediately.

Finally, the disposal of used batteries should also be cautious. Used batteries must not be discarded at will, but should be sent to brand after-sales service or professional battery recycling points for disposal. If the battery leaks, avoid direct contact with the leaking liquid and clean the contaminated surface with a dry cloth.

By following the above battery management and safety precautions, you can effectively extend the battery life, ensure safe use, and provide reliable protection for the efficient operation of the work light.