Efest SLIM K4 Charger

Efest SLIM K4 Charger

The Efest SLIM K4 Charger is a high-quality, portable battery charger designed for efficient and safe charging of a variety of Lithium IMR 3.6V/3.7V batteries With its auto-detect charging technology, multiple charging slots, and compact design, it’s ideal for vapers and users of high-drain devices who require a reliable and versatile charging solution.

Key Features:

1. Wide Compatibility: Supports a range of Lithium IMR batteries, including popular sizes like 18650, 20700, 21700, and more.
2. Four Charging Slots: Charge up to four batteries simultaneously with independent charging for each slot.
3. Auto-Detect Charging Current: Automatically adjusts the charging current based on the number and type of batteries inserted:
   • 2×1.0A for two slots.
   • 1×1.0A for a single slot.
   • 4×0.5A or 3×0.5A for four or three slots, respectively.
4. Auto Cut-Off and Recharge: Stops charging when batteries reach 4.2V and reactivates if voltage drops to 4.1V, preventing overcharging.
5. Safe and Efficient: Includes features like auto cut-off voltage, CV cut-off current, and activation current control for safe charging.
6. Compact and Portable: Lightweight design makes it easy to carry and use on the go.
7. Durable and Reliable: Operates efficiently within a temperature range of 0℃ to 40℃ and stores safely in temperatures as low as ﹣40℃

Specifications:

• Brand: Efest
• Product Name: SLIM K4 Charger
• Input Power: DC 5V 2A
• Charging Currents:
  • 2×1A CC Current: 2000mA ± 10>#/li###
  • 1×1A CC Current: 1000mA ± 10>#/li###
  • 4×0.5A/3×0.5A CC Current: 500mA ± 10>#/li###
• Auto Cut-off Voltage: 4.20V ± 0.05V
• CV Cut-off Current: ＜100mA
• Standby Current: ＜20mA
• Activation Current: 50mA~100mA
• Auto Recharge Voltage: 4.10V ± 0.10V
• Operation Temperature: 0℃~40℃
• Storage Temperature: ﹣40℃~+70℃
• Compatible Batteries:
  • Lithium IMR 3.6V/3.7V batteries: 10440, 14500, 16340, 17340, 18350, 18490, 18500, 18650, 26500, 26650, 20700, 21700

Package Contents:

• 1 x Efest SLIM K4 Charger
• 1 x USB Cable
• 1 x User Manual

FAQ:

Q: Can the Efest SLIM K4 Charger charge different battery sizes simultaneously? A: Yes, the charger supports independent charging for each slot, allowing you to charge different battery sizes at the same time.

Q: How does the auto-detect charging current work? A: The charger automatically adjusts the charging current based on the number of batteries inserted:

• 1A for 1-2 batteries
• 0.5A for 3-4 batteries

Q: Does the charger have overcharging protection? A: Yes, it features auto cut-off voltage at 4.2V and reactivates charging if the battery voltage drops below 4.1V

Q: What power source can I use to charge the Efest SLIM K4 Charger? A: Use a USB power source with a 5V/2A output for optimal charging performance.

Q: Is the charger portable? A: Yes, its compact and lightweight design makes it ideal for traveling or on-the-go use.

Conclusion:

The Efest SLIM K4 Charger is a reliable, efficient, and portable charging solution for users of multiple Lithium IMR batteries. With its auto-detect charging current, wide compatibility, and built-in safety features, it ensures fast and safe charging for high-drain devices. Perfect for vapers and gadget enthusiasts, the SLIM K4 delivers convenience and performance in one compact device.