Each sensor in the Billy kit requires one 3v lithium battery. Use the below guide to find the correct size battery for your sensor.
We recommend that you use Panasonic batteries as we have found them to last longer in the sensors, but don't worry, other brands are still suitable.
| Sensor | Required Battery |
|---|---|
 |
cr2477 3v
|
 |
cr2450 3v
|
 |
CR2 3v
|
 |
cr2450 3v
|
