Note: Batteries not included. You can buy here your lithium batteries originais.

The Efest Slim K4 is a high-performance four-slot charger designed to offer speed and safety in charging your batteries. With a compact and intelligent design, this model automatically detects the needs of each battery, ensuring efficient charging. It is the ideal choice for users seeking reliability and practicality in daily use.

Technical Specifications

• Brand: Efest
• Certification: Product CE and RoHS certified.
• Number of slots: 4 independent charging channels.
• Input: AC 100~240V 50/60Hz or DC 5V 2A.
• Output: DC 5V 2A.
• Compatibility: 10440, 14500, 14650, 16340, 16650, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 26500, 26650.
• Interface: LED indicator to monitor battery life.

Instructions for Use

1. Connect the power cable to a suitable power source.
2. Insert the batteries into the slots, ensuring the polarity is correct.
3. The LED indicators will show the charging status in real time.
4. Remove the batteries as soon as charging is complete to maximize their longevity.

In case of abnormal behavior, stop use and contact us at our support.

• Electrical Safety Warning: Certified with CE and RoHS protections against overcharge, short circuit, and polarity reversal. Never leave batteries charging unattended or on flammable surfaces. For a safe experience, consult our Beginner's FAQ.