Raddy WF-100C Lite User Manual page 7

Install 3 AA brand new batteries (recommend using Li-ion batteries, which generally
can last over 1 year) in the battery compartment.
Close the battery lid. To prevent being flooded with water in the battery compartment,
make sure the gasket (around the battery compartment) is properly seated in its
trace prior to close the door. Tighten the set screw.
Warning: DO NOT install the batteries in a wrong way. You may permanently
damage the sensors. The solar panel does not charge the batteries, so rechargeable
batteries are not recommended.
Note: We recommend installing Lithium AA batteries for sensors. (When the
outdoor temperature is lower than -20°C (-4°F), the battery might not work properly.)
The sensor LED indicator will light for 3 seconds, and then flash once per 16
seconds thereafter. Each time it flashes, the sensor is transmitting data. Replace the
battery lid and push to tighten it.
6