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This sleek, yet portable Efest Slim K1 Charger is a 1-bay charger with a convenient micro-USB input, charging at 1A CC current.


This Efest Slim K1 Charger might look small and simple, but it’s packed a multitude of features including: reverse polarity, over-charging detection, and short circuit protection. Fun fact: this charger is made with a piano wire spring for smooth sliding action and is tested over 15,000 times for quality control. There’s also a steel cathode with low resistance and hard chromium plating processing for the ultimate charging precision.


The Efest Slim K1 Charger also features an LED indicator so you can easily see when your batteries are ready, and supports any 3.6V/3.7V lithium battery. Keep your mod going all day long with help from the super portable Efest Slim K1 Charger!




Fast charging mode 1.0A

Portable design with high-quality piano strings

Battery Life LED Indicator light

Reverse polarity protection

Activation function

Auto detect charging function

Over charging protection

Short circuit protection




Fit to 3.6v or 3.7v lithium battery in different sizes

Operation Temperature: 0C ~ 40C

Storage Temperature: -40C ~ 70C

Single Slot 5V/1A Micro USB Charger

AC Input Power: AC 100~240V 50/60Hz

DC Output Power: DC 5V 1A

DC Input Power: DC 5V 1A


What’s In The Box:


Slim K1 charger body

USB cable

Warranty card

Operation manual


Shipping Weight 0.2000kg

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