&nbsp;Rechargeable batteries could work, but we recommend sticking with the standard AAA non rechargeable Alkaline Batteries as they are 1.5V each (3V total) vs the rechargeable battery being only 1.2V each (2.4V total). With the rechargeable battery having a lower voltage, the sensor would detect a low battery sooner, and could also reduce the wireless distance.&nbsp;
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MORE Q &amp; A Help for SENSORS
<ul>
<li style="margin-left:1.5em;"><a href="https://osigodirect.kb.help/sensor-information-max-distance-type-of-batteries-battery-installation/"><ins>SENSOR - Information: </ins><ins>Max Distance, type of Batteries &amp; Battery Installation </ins></a></li>
<li style="margin-left:1.5em;"><a href="https://osigodirect.kb.help/sensor-how-to-install-placement-tips-installation/"><ins>SENSOR - How to Install:</ins><ins> Placement Tips &amp; Installation </ins></a></li>
<li style="margin-left:1.5em;"><a href="https://osigodirect.kb.help/sensor-how-to-connect-to-alarm-how-to-add-or-re-add-sensors-with-smart-life-app/"><ins>SENSOR - How to Connect to Alarm: </ins><ins>How to add (or re-add) sensors with app using Smart Life App</ins></a></li>
<li style="margin-left:1.5em;"><a href="https://osigodirect.kb.help/sensor-connection-issues-open-door-warning-stuck-not-connecting-troubleshooting-tips/"><ins>SENSOR - Connection Issues:</ins><ins> Open door warning stuck, not connecting &amp; troubleshooting tips </ins></a>&nbsp;&nbsp;</li>
</ul>

 Rechargeable batteries could work, but we recommend sticking with the standard AAA non rechargeable Alkaline Batteries as they are 1.5V each (3V total) vs the rechargeable battery being only 1.2V each (2.4V total). With the rechargeable battery having a lower voltage, the sensor would detect a low battery sooner, and could also reduce the wireless distance. 
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MORE Q & A Help for SENSORS
SENSOR - Information: Max Distance, type of Batteries & Battery Installation 
SENSOR - How to Install: Placement Tips & Installation 
SENSOR - How to Connect to Alarm: How to add (or re-add) sensors with app using Smart Life App
SENSOR - Connection Issues: Open door warning stuck, not connecting & troubleshooting tips   

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