Using the Makita BL4040 battery is easy. First, make sure the tool is turned off before inserting or removing the battery. Insert the battery into the tool until it clicks into place securely. When you're ready to use the tool, turn it on and start your work. The four bright green LED indicators on the battery will show you the charge level, so you'll know when it's time to recharge. To charge the battery, use the compatible charger (sold separately). It only takes 45 minutes or less to get a full charge. Just place the battery in the charger and wait. As for maintenance, keep the battery clean and dry. Avoid exposing it to extreme temperatures or moisture. The battery has an enhanced cooling system, but it's still a good idea to let it cool down after heavy use. Also, be aware that the digital communication in the battery and charger actively protects against overload, over - discharge, and overheating. But don't try to use the battery in a way that exceeds its specifications. And remember, this battery comes with a 3 - year limited warranty, so if you have any issues within that time, you can reach out for support.
