# Power Supply ## Power Supply Type The iQ WMR is powered from the iQ Universal Device and it has 2 ways of being powered. It can be powered by 2x internal lithium AA battery and/or by supplying 5-24VDC to the screw connector. {% hint style="info" %} The batteries are non-rechargable, the battery can act as backup power when using the 5-24VDC power supply. {% endhint %} ## Battery Autonomy The battery autonomy is highly dependant on the environment of where the device is installed and the local network quality. Our calculations for the battery autonomy are performed at a temperature of 18°C based on 500 rotations per day. Based on SF7 and a transmission interval of 60 minutes the battery autonomy is > 15 years. Based on SF12 and a transmission interval of 60 minutes the battery autonomy is 3 years. --- # 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://docs.yobiiq.com/welcome/user-manual-iq-wmr/device/physical-interfaces/power-supply.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.