Shenzhen Drowsen Technology Co., Ltd is a company specializing in Manufacturing and Marketing of Lithium ion battery pack, with a well-known Brand Li-ion King in China, focusing on 18650 lithium battery especially.Other type of environmentally friendly cylindrical lithium ion batteries are covered too. Drowsen established in 2011 with headquarter in Longhua, Shenzhen and branches in Dongguan and Huizhou.Since foundation,Drowsen has been engaging in making the lithium ion battery with best cost performance, following with the ISO9001:2008 standards. With continuous improvement,the batteries are certified by CE, RoHS, UL, UN38.3 etc.. Safety is always the core value.Drowsen R&D department continually develop new material and craft, working with several reputed vendors and colleges.1300/1500/2000mah Motive type, 2600/3200mah high capacity type are developed which are widely used in Ebike, motive power tool, EV, Solar and other energy storage fields. Drowsen is open to the world and care about the Earth. In the following years, Power Bank, Tablet PC Battery, Ebike Battery, Power Tool Battery and Solar Power System will be the major focus, and working on to replace the lead acid battery, Ni-Cd battery by eco-friendly Lithium ion battery to make more contribution to the world.