Hello and thank you for your review. We are glad to hear the mower and blower in your Greenworks 48V (24V x 2) combo kit are performing well, but we are sorry to learn the string trimmer is cutting out even when fully charged. When a trimmer shuts down intermittently, it is often related to airflow restrictions, line feed issues, or temporary overload protection being triggered during use. We recommend checking that the spool is not overfilled or jammed, ensuring the cutting line can feed freely, and removing any grass or debris buildup around the trimmer head and guard. It can also help to use smooth, continuous cutting motions and avoid forcing the tool through dense or thick vegetation, as this can cause the motor protection system to temporarily stop operation. If the issue continues after these steps, we recommend reaching out to Greenworks Success team for further assistance under. They can be reached either using the online chat function, on Greenworks Tools page, or by calling 1-888-909-6757.