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 Description Mini portable external battery charger keychain power bank for emergency charge 4000mah, 4400mah, 5200mah power bank built-in Lithium-ion 18650 battery pack LED indicates charging status Over current over charge over discharge over heating and short circuit protection Supplied with USB cable and micro connectors Product item:power bank Product NO:Q3 Battery cell:Lithium-ion 18650 Specification: 92.5*45*22.5(mm) Out-put voltage(V): DC5V Out-put current(A): 1.5A In-put voltage(V):DC5V In-put current(A):1.0A MAX Standard charing voltage(V):5.0V Restrition charging voltage:5.0V±0.25V Plastic case:material,character silk-printing Capacity:4000,4200,5000mah, negotiabl...