In order to meet the requirements of transportation safety, the factory only charges the product to approx. 30% battery power. It is recommended to charge the product for more than 4 hours before using it for the first time. This will prolong the battery life. If the device will not be used for a long time, please charge the battery every three months to prevent battery damage. A full charge takes approx. 4 hours, and when the product is fully charged, the Charging Indicator Light goes off.