Using the ToolkitRC M8D touch screen charger is easy. First, connect the charger to a power source using the provided USB - C or XT90 input cable. Then, follow the on - screen instructions to set up your charging parameters. Make sure to read the manual before use for specific battery type settings. When using, keep the charger in a well - ventilated area and avoid overheating. To maintain the charger, regularly clean the touch screen with the included screen protector on. Also, store it in a dry place when not in use.