# Upgrade T35 to T35-X Once you have your T35-x kit, please read carefully and follow the instructions **step by step** to replace the battery and housing. When you’re all done contact your supplier or email and let us know. We will reset your battery level and record that you have completed the upgrade. {% file src="/files/d4WS69SlEDkBlcKDeDlj" %} Printable Instructions {% endfile %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://help.waterwatch.io/3.0.1/hardware-and-maintenance/maintenance/upgrade-t35-to-t35-x.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.