Using the Makita BL1840BSCX3 Starter Pack is easy. First, insert the 18V LXT 4.0Ah battery into the charger and wait up to 90 minutes for a full charge. You can check the charge level using the LED indicator on the battery. Once charged, insert the battery into your tool. The angle grinder's X - LOCK system allows you to change blades quickly. When using the sander, hold it firmly and move it smoothly over the surface. For the diamond blade, use it to cut hard materials like ceramic or granite. Remember, this battery is only compatible with Star Protection tools. When not in use, store the battery in a cool, dry place. It resists self - discharge, so it'll be ready for your next project. Also, take advantage of the 3 - year limited warranty for peace of mind.