Note: Batteries not included. You can purchase your original lithium batteries here.

The Efest Slim K1 is a compact single-slot charger designed for maximum portability and reliability. With an ergonomic design that uses high-precision springs, it ensures stable and durable contact. It is the ideal solution for those looking for a practical, safe charger with smart 1A charging via Micro USB.

Technical Specifications

• Brand: Efest
• Certification: CE and RoHS certified product.
• Number of slots: 1 smart charging channel.
• Charging current: 1A (1000mA).
• Input: Micro USB (DC 5V 1A).
• Compatibility: 10440, 14500, 14650, 16340, 16650, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 26500, 26650.
• Interface: State LED indicator light for charging.

Instructions for Use

1. Connect the Micro USB cable to a compatible power source (5V 1A).
2. Insert the battery into the slot, ensuring that the polarity (positive/negative) matches the markings on the device.
3. The LED indicator will light up to signal the charging process.
4. Disconnect the charger and remove the battery after the indicator signals full charge.

In case of anomalous behavior, stop using and get in touch with our support.

• ELECTRICAL SAFETY NOTICE: Certified with CE and RoHS protections against overload, short circuit, and reverse polarity. Never leave batteries charging unattended or on flammable surfaces. For a safe experience, consult our Beginners FAQ.