High quliaty grade a battery aluminum powerbank, portable laptop powerbank 10000mah 20000mah with dual usb output specification: Power bank model: hj-pb25 Item capacity: 10400mah Built in battery:18650 battery with full capacity High safety and at most protect your electronics product Colour: silver, black . Also accept customised color requirement Material: alloy, perfect surface feeling Input voltage/ max current: dc5v/ 0.8a Output voltage / max current: dv5v/ 1a , dc5v/ 2.1a Conversion efficiency over 80% Cycle life more than 500 times Operating temperature: -10~50¡ãc Dimension : 9*7.5*2 cm Beautiful and elegant surface Support oem & odm 40pcs / carton Carton size :45*35*20 cm Carton weight : 9 kg / carton