The Gravity X has a high quality, high capacity battery and shall only be charged using the charger supplied with the unit. Charging the Gravity X from 0% to 80% battery capacity takes approximately 5 hours. Charging the remaining 20% takes 1-2 hours.
The USB cable needs to be inserted as explained in this image below. Inserting it the wrong way could damage the device.
The USB cable needs to be inserted as explained in this image below. Inserting it the wrong way could damage the device.