Features: and high quality SM4P 400mA output current, 7.4V (3.7V x2) output voltage Automatically adapts to USB input power, quickly and stably recharges the battery USB charger SM-4P plug for Li-ion battery, compatible with RC toys, cars, boats Please check the correct positive/negative connection between the charger and your batteries Intelligent load identification chip prevents excessive current and voltage from entering, protecting the device from damage Specifications: Item: USB Li-ion Battery Charging Cable Input: DC 5V Output Voltage: 7.4V (3.7V x2) Output Current: 400mA Adapter Length: Approx 63mm / 2.47in Note: Before placing an order, please confirm the positive and negative terminals of the battery plug Please allow 01cm error due to manual measurement. Ensure you are comfortable with this before purchasing Due to differences between monitor displays, the image may not reflect the actual color of the item Package includes: 1 x Battery Charger