1.0 Introduction This is a short blog post containing a step-by-step guide to convert the Tuya Zigbee Valve battery power supply to a DC/Mains power supply. This upgrade means you no longer need to worry about batteries draining as the device will have a continuous power source for your smart irrigation system. In this guide, I’ll walk you through the process, step-by-step. Tuya Zigbee Smart Watering Timer Smart Sprinkler Drip Irrigation System Built-in Water Flow Recorder Water Controller 2.