... amorphous silicon solar panel charging,10hours of full power light,1.5hours continuous discharge,5-year service life ... back have a button,the button control the light,can printing LOGO on back Battery1pcs CR2032 Rechargeable batteryled color/shell colorwhite/black ... workers, administrative staff and technicians.Our main products are LED light,flashing badges, glowing cups , flashing ice-tubes, glowing ...