... optional OW-12/24-C400.12V/24V(400WH).Use for all 12V,24V,5V devices 400WH External Battery 12V 16V 19V 24V optional Specification ... /cUL PSE GS CE CB FCC Output Convert Tips 6.3*3.0 green6.5*4.5*1.4 yellow or black ... ,2. High capacity, portable, backup,universal, external ,convenient to carry.3. Various circuit function protections, to ensure the safety and stability ...