Using the NT 22/1 is easy. First, make sure the removable lithium - ion battery is fully charged. Then, attach the appropriate accessory like the crevice nozzle or filter bag. You can start cleaning different areas such as floors, corners, and even car interiors. When using the window cleaner attachment, spray the cleaner on the window and wipe it clean. For maintenance, empty the 5.8 - gallon container regularly to keep the suction strong. Clean or replace the filters as needed to ensure good air flow. Also, store the vacuum in a dry place. When charging the battery, use the provided charger with the 100 - 240V, 50 - 60Hz power supply. Don't overcharge the battery and avoid using it in extremely hot or cold conditions.