... 5mm, 102g (including LiPo battery and built-in solar panel), Battery Capacity: LiPo battery, 3.7VDC at 1800mAh, Battery LED Indicator: ... 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 ... Discharge takes place. Notes to the 3-way switch:Move to OUT to charge cell phones and move to IN to charge the built-in battery ...