Features:brand new and high qualitySM4P 400mA output current 7.4V 3.7V x2 output voltageAutomatically adapt to USB input power, quickly and stably recharge the battery.USB charger SM4P plug for Liion battery electric RC toys car boat USB charging cablePlease check the correct Positive/Negtative connection between the charger and your batteries.The intelligent load identification chip blocks excessive current and voltage from entering and protects the device from damage.Specifications:Item: USB Liion Battery Charging CableInput:DC 5VOutput Voltage: 7.4V 3.7V x2Output Current: 400mAAdapter Length:Approx 63mm/2.47inNote:Before place an order, please confirm the positive and negative terminals of the battery plug.Please allow 01cm error due to manual measurement. plz make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package includes:1 x Battery Charger