Efest Slim K4 Charger

Battery Charger

Efest Slim K4 Charger


In stock

10440, 14500, 17500, 17670, 18350, 18490


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.


    All orders have a processing time of 24-72 hours You may not return consumable items. This includes, but is not limited to: liquid products, coils/pods, cartridges, mods, and batteries. Any item deemed consumable is non refundable. Billing Validation All credit card billing address information you provide must match in our system with that of the cardholder. If the information does not match, your order will be declined. Credit Card Validation For the protection of card holders and our company, orders that appear fraudulent may be put on hold for manual review. If necessary, a Customer Service Representative will call you to verify the order. If we are unable to reach you at the provided phone number or email address within a reasonable period of time, the order will be cancelled. Manual review may delay the shipment and delivery of your order. We reserve the right to cancel any order before it is shipped. Refusal or Limit of service Due to the nature of internet sales, we reserve the right to refuse service to anyone. If you feel your refusal of service was unnecessary, please contact our Customer Service team at info@vaping-delights.com Please refer to our Refund Policy page for more detailed information.

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