Efest – Slim K4 Charger

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Efest – Slim K4 Charger

Compatible with Lithium IMR 3.6V/3.7V Batteries: 10440 / 14500 / 16340 / 17340 / 18350 / 18490 / 18500 / 18650 / 26500 / 26650 / 20700 / 21700
Cost effective and easy to use, the Slim K4 charger comes with a user manual and packaging with instructions in 7 different languages. Incredibly lightweight and conveniently portable!

Input Power ———— DC 5V 2A
2*1A CC current ———— 2000mA±10%
1*1A CC current ———— 1000mA±10%
4*0.5A / 3*0.5A CC current ———— 500mA±10%
Auto cut-off voltage ———— 4.20V±0.05V
CV cut-off current ———— <100mA
Standby Current ———— <20mA
Activation Current ———— 50mA~100mA
Auto recharge voltage ———— 4.10±0.10V
Operation Temperature ———— 0°C~40°C
Storage Temperature ———— -40°C±70°C

LED INDICATOR DESCRIPTION – After inserting the battery into the slot correctly, the Slim K4 will start charging the battery automatically within a few seconds. The LED indicator lights will show white while the battery is charging and change to blue once fully charged. 

HIGH QUALITY CRAFTSMANSHIP – Spring made by piano wire, it provides a smooth sliding action when installing and removing batteries. Steel cathode with low resistance and hard chromium plating processing to achieve a more precise charging voltage. 15,000 + times spring testing quality warranty.

USB PORT DESIGN – The Type-C USB port reduces the heat of the port effectively.

Additional information



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