Each sensor in the Billy kit needs one 3v lithium battery. Use the guide below to find the right size battery for your sensor.
These can normally be found in store at Battery World. Use this link to find your nearest store: https://www.batteryworld.com.au/Find-A-Store
You can also order online at https://www.batteriesdirect.com.au/
On average, the batteries in a Billy sensor will need to be replaced every 6 months. This can vary depending on the brand of battery used. We recommend that you use Panasonic batteries as we’ve found they last longer in the sensors, but don't worry, other brands still work.
| Sensor | Required Battery |
|---|---|
 |
CR2477
|
 |
CR2450
|
 |
CR2
|
 |
CR2450
|
