Display screen : NoQuick charge : YesType : ElectricIntelligent Charge : YesCertification : CEPackage : YesModel Number : 21V 2AUse : Standard Battery21V 2A Lithium Battery Charger Electric Screwdriver 18V 5Series 18650 Lithium Battery Wall Charger DC 5.5 * 2.1 MM Free shippingProduct specification: Input: AC100-240V 50/60HZ 0.8ACharging voltage: DC 21VCharging current: 2ACharging mode: CC-CVCharge indicator: Red light = charging, green light = fully chargedCharger port: DC5.5 x 2.1/2.5Dimensions: 94 x 47 x 33 mmSecurity protection: OVP/OCP/overload protection/short-circuit protectionApplication: Lithium batteries (lithium-ion batteries, lithium polymer batteries) the nominal voltage of the battery pack is 18V-21V Protective functions: 1. Input over-current protectionWhen the input current is greater than 2A, the charger will cut off the fuse to avoid internal circuit abnormalities causing fires and other risks. 2. The output current protectionLi-ion battery charger for charging current is limited to a range to maintain battery safety and battery life. 3. Short-circuit protectionWhen the charger is improperly used, the charger output current will be 200mA or less to avoid damage.