Using the Makita 18V LXT Starter Pack is easy. First, charge the 18V LXT 4.0Ah batteries using the included charger. It takes about 90 minutes for a full charge. You can check the battery charge level with the L.E.D. indicator. When using the angle grinder, make sure to wear proper safety gear like goggles and gloves. The X - LOCK system allows you to change the blade quickly. Just follow the instructions on the grinder. For the blower, it's cordless, so you can use it freely. When it comes to maintenance, keep the batteries in a cool and dry place. Avoid over - discharging them. Clean the tools regularly, especially the grinder after using it on hard materials. Check the contact terminals of the battery to make sure they're clean. If you have any issues, remember the pack comes with a 3 - year limited warranty.