Simple Aqara Temperature Sensor AA Battery Adapter

This is a simple yet effective adapter that allows you to power your Aqara Temperature and Humidity Sensor using a standard AA battery instead of the original CR2032 coin cell.By switching to a AA battery, you greatly increase battery life, making it ideal for long-term use in hard-to-reach locations like freezers or outdoor spaces.The adapter is compact, easy to print, and fits snugly over the sensor’s original battery slot. It has been tested in sub-zero temperatures (down to -20°C), where CR2032 coin cells tend to underperform due to voltage drops and limited capacity.Use cases:Long-term freezer temperature monitoring (my use case)Outdoor or garage placement during winterReducing maintenance on sensors in difficult-to-access spotsWhat you need:Aqara Temperature and Humidity SensorAA battery holder (available on Amazon, eBay, etc.) Dutch amazon linkAA batteries (Lithium AA batteries are recommended for sub-zero environments)This printed adapterA soldering iron and basic soldering ski