Below is a diagram showing how to charge your Spark Nano 4.0's Extended Battery using the Fast Charge Cable. The charge process should take approximately 20 hours. If you do not have a Fast Charge Cable, please read our instructions on how to charge the Spark Nano 4.0 and Extended Battery using a Y Cable here: http://help.brickhousesecurity.com/customer/portal/articles/1524276-charging-the-spark-nano-4-0-and-extended-battery-using-the-y-cable
*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. Please charge the Battery Pack along with your Nano and charge it for about 60 hours to get a full charge. Once it is full 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.