18650 21700 is the most popular li-ion battery cell. We had been distributing 18650 21700 cells from Panasonic, Murata(Sony), Samsung, LG and Molicel since 2014. To offer the the safest li-ion battery pack with many cells series connections and parallel connections, the best quality cells Panasonic, Murata(Sony), Samsung, LG and Molicel will be used. Our engineer team had tested more than 230 models cells, they have a very deep know-how for these cells. Work with our engineer team, you can get the most suitable cell solutions.