The tracker pod contains a rechargeable battery that needs to be charged with the USB charger that is included with the product.
To charge the pod, remove it from the band, then insert it into the charger. One end of the pod has metal contacts that need to make contact with the metal contacts in the charger. Then insert the charger into a USB port on your computer. It may take 4-8 hours to charge the pod for the first time.
When the charger is plugged in, the lights will light up. While charging you will see the led light blinking, this will indicate what the percentage the battery is charged to. When the Link is fully charged all four lights will be solid blue.
NOTE: Inserting the charger into a USB wall charger, or USB car charger, will charge the tracker pod quicker.