When the yellow light starts blinking on the CORE, the battery in CORE will need to be charged. Insert the included micro USB cable into the USB port on the device and plug the other end into a UL-certified USB wall charger. The LED will turn solid yellow, signifying that it is charging. The LED will change to solid green when the device is fully charged.
To fully charge the battery, it should take about 2.5 hours. When fully charged, the CORE should last for about 10 hours of continuous use. We recommend turning the device Off between each use to maximize use of the battery.
NOTE: CORE will not turn on while it is plugged in and charging.