Using your DeWalt DCG413H1 small angle grinder is easy. First, make sure the battery is fully charged. You can check the charge status using the 3 - LED fuel gauge on the battery. Insert the battery into the grinder properly. To start the tool, since it has a two - stage trigger, you'll need to perform two actions. When using, hold the grinder firmly with the side handle. The grinder has great safety features. The kickback brake will activate if there's a pinch, stall, or bind - up, and it'll stop the wheel quickly and shut off the grinder. The brake can stop the wheel in about 2 seconds on average. In case of a power outage, the e - switch protection will require you to cycle the trigger switch to restart the tool. As for maintenance, keep the grinder clean after each use. Wipe it down to remove any dust or debris. Store the battery in a cool, dry place. Also, make sure to use the provided kit bag to keep all the components organized and protected. Don't forget to use the inner and outer flange and the 4 - 1/2 inches Type 27 guard as they're important for safety and proper operation.