Slim K1 Charger - Efest

- Efest

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Brand: Efest | Product code: Efest-k1

EFest Slim K1 Intelligent Charger

A compact yet powerful and highly reliable battery charger from Efest. With a single slot, micro USB input and charging at 1A this is an effective and easy to use charger.

The Efest Slim K1 Charger features reverse polarity, short circuit, overcharge protection and many more safety features. Check out our range of rechargeable batteries and vape on!


  • Fast charging mode: 1.0A
  • Fits various 3.6V and 3.7V Li-ion batteries
  • Reverse polarity protection
  • Activation function
  • Auto-detect charging function
  • Over-charging protection
  • Short circuit protection
  • CE and RoHS certified
  • Spring made from piano wire provides a smooth sliding action when installing and removing the battery
  • Steel cathode with low resistance and hard chromium plating achieves a more precise charging voltage


  • AC input power: AC 100~240V 50/60Hz
  • DC output power: DC 5V 1A
  • Auto cut-off voltage: 4.20+/-0.5V
  • Standby Current: <20mA
  • Auto recharge voltage: 4.10+/-0.10V
  • Storage temperature: 40-70 C
  • DC input power: DC 5V 1A
  • 1A CC current: 1000mA+/-10%
  • CV cut-off current: ,100mA
  • Activation current: 50mA~100mA
  • Operation temperature: 0-40C

In the box:

  • Slim K1 charger body
  • USB cable
  • Operation manual

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