Below is a diagram showing how to simultaneously charge your extended battery and Spark Nano 4.0 using a Y cable.* In order to charge your extended battery with the Y cable, the Nano 4.0 must be present. A full charge will require up to 60 hours of charge time. For instructions on how to charge your extended battery individually using the Fast Charge Cable, follow this link: http://help.brickhousesecurity.com/customer/portal/articles/1302655-spark-nano-4-0-extended-battery-diagram
*The extended battery pack/kit does not come with a separate charger, you will use the same one that came with your Spark Nano 4.0. Once the device is fully charged, be sure it is on with the LED's blinking and it will be ready to track. Please see our FAQ's for further information regarding the Spark Nano 4.0, Extended Battery, and the tracking website.