brand new and high qualityInstructions:This USB cable lights up red when connected to the power supply, turns off when charging, and lights red when fully charged.Lightweight,portable,reliable and powerful USB charger.Function:Intelligent charging management IC is configured inside the charging line,which can accurately charge the 3.7V lithium battery.It will stop automatically when fully charged without overcharging.Plug and for play.As long as the USB is connected to the device,it can be charged normally,and other work can be done at will during the charging process.FunctionThe charging cable is equipped with intelligent charging management IC, which can accurately charge the 3.7V lithium battery. It will stop automatically without overcharging. The full-charge cut-off voltage is 4.23V, making reasonable use of the characteristics of lithium battery and extending the service life of lithium battery.Charging indication:Plug the power supply, the red light is on, the red light is off when the battery is connected to charge, the red light is on when fully charged.Scope of application: Polymer lithium battery, cylindrical lithium battery, digital lithium battery, remote control aircraft lithium battery.The USB battery charger cable with JST plug, output 3.7V 500ma, is suit for JST 3.7V(1S) Lipo battery.Note: For Lipo battery only, do not use for Ni or Ni-Cd battery.Specification:Material: ABSPlug model: JST for headType: 3.7V USB charging cableInput: for DC 5V 0.5-2AOutput: for DC 4.2V/500mAStandard voltage: 4.2VColor: BlackSize: One SizeCable Length: 630mmQuantity: 1 Pc