Efest Slim K1 Intelligent Charger

by Efest

  • £7.99

Another powerful, compact and highly reliable product from EFest: the EFest Slim K1 Intelligent Charger. Featuring a single slot charger, Micro USB input and charging at 1A, the K1 Intelligent Charger ensures reliability and ease of use. The battery bay utilises a spring made from piano wire to provide a smooth sliding action when installing and removing batteries. As with all their devices Efest has included a vivid and intuitive LED display, which shows the user when batteries are charging and when they are fully charged with auto stop functionality.


  • 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

High Quality Spring:

  • 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 temperagure: 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


  • Slim K1 charger body
  • USB cable
  • Operation manual

Our recommendation is to take care when recharging batteries, as they can be dangerous if used incorrectly and as result we are not responsible for ANY damage caused during use. If you’re unsure whether this product is suitable for your particular set-up, just ask us!

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