WE, URIMKOREA, is producing and developing technically LED Light and Lithium-ion battery pack. In its product groups, there are LED LIGHT, SOLAR PANEL, LI-ION BATTEY PACK,and GENDER. In particular, LED LIGHT which cae than 10 hours and external LI-ION batteries which can be used for more than 5 hours for notebooks in an office with no electricity are the prides of our company. Besides, NOTE INVERTER with which a refrigerator can be used for 2~4 hours during the blackout is equipped with LI-ION batteries. This is the best of our technologies.