Efest Slim K1 Battery Charger

Efest Slim K1 – 1 Bay USB Lithium Battery Charger Overview The Efest Slim K1 is a compact, single-slot USB lithium battery charger, designed for safe, efficient, and portable charging. With its intelligent charging capabilities, the Slim K1 automatically detects battery type and applies the appropriate charging current to optimize battery life and performance. Its slim and lightweight design makes it perfect for travel, everyday use, and emergency charging needs, ensuring convenience and reliability for flashlight users, vapers, and professionals. Key Features ✅ Wide Lithium-Ion Compatibility: Supports various 3.6V/3.7V Li-Ion/IMR/INR/ICR batteries, including 18650, 20700, 21700, and more.✅ Portable & USB-Powered: Ideal for on-the-go charging, powered via USB cable.✅ Smart Charging System: Automatically detects battery type and applies optimal charging current.✅ Fast & Safe Charging: 1A charging speed for efficient battery replenishment.✅ Multiple Safety Protections: Feature