Using the Bosch GWX18V - 8B15 angle grinder is a breeze. First, make sure the battery is fully charged. Insert the CORE18V® 4 Ah battery into the grinder. You can adjust the side handle to the position that feels most comfortable for you. When it's time to change the grinding wheel, use the X - LOCK system. Just mount the wheel and you'll hear a snap to confirm it's in place. To release the wheel, simply pull the lever. When starting the grinder, thanks to the soft - start technology, it will smoothly ease into the cut. Be careful not to overload the grinder. The overload protection is there to help, but it's still important to use it within its capacity. After each use, clean the grinder with a dry cloth. Store it in the included carrying bag to protect it from dust and damage. Also, remember to charge the battery regularly to keep it in good condition. The charger is included in the kit, so you can charge it whenever needed. And don't forget, the Bosch 18V cordless power tools and chargers have a five - year limited warranty, while the batteries have a three - year limited warranty. Check the details on https://rb - pt.io/PowerToolWarranty or call 1 - 877 - BOSCH99.