... 102g (including LiPo battery and built-in solar panel), Battery Capacity: LiPo battery, 3.7VDC at 1800mAh, Battery LED Indicator: Blinking ... when fully charged or discharged, DC Jack to Battery: For use of the USB cable provided, i.e., ... to charge up the built-in battery via a computer. Note: Switch to IN to ... and move to IN to charge the built-in battery. Remain in middle, everything is off, i.e ...