Smart Dual Slot USB Charger for Double 18650/21700 Lithium Batteries 3.7V/4.2V

This advanced USB charger is designed to efficiently charge two lithium batteries simultaneously, compatible with both 18650 and 21700 types. It supports charging voltages of 3.7V and 4.2V, ensuring your batteries are powered up quickly and safely. The charger's dual-slot functionality and smart charging technology provide optimal performance and convenience, making it ideal for those who rely on high-capacity rechargeable batteries. Compact and user-friendly, this charger is a perfect addition to your tech accessories, catering to both personal and professional needs. Input parameters: 5V Output Parameters: 3.7V-2A Manufacture country: China Instructions included: No