WARNING: This product contains nicotine. Nicotine is an addictive chemical.



Efest Slim K1 Charger Description:

The Efest Slim K1 Charger is a high quality and portable single bay charger with micro USB input that has a fast charging speed of 1.0A. The Slim K1 is designed with a spring made by piano wire, providing a smooth sliding action when installing and removing batteries. The steel cathode with low resistance and hard chromium plating processing allows for a more precise charging voltage.


  • Compatible with: 10440, 14500, 14650, 16340, 16650, 17650, 17670, 18350, 18500, 18650, 20700, 26500, 26650
  • Portable design with quality piano strings
  • Battery life LED indicator light
  • 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
  • 1A CC current: 1000mA (+/- 10%)
  • Auto cut-off voltage: 4.20 (+/- 0.05V)
  • CV cut-off current: <100mA
  • Standby current:: <20mA
  • Activation current: 50mA~100mA
  • Auto recharge voltage: 4.10 (+/- 0.10V)
  • Operation temperature: 0C~40C
  • Storage temperature: -40C~70C
  • Fast charging mode: 1.0A
  • Reverse polarity protection
  • Activation function
  • Auto-detect charging function
  • Over-charging protection
  • Short circuit protection
  • 1 x Efest Slim K1 Charger
  • 1 x USB cable

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