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Efest Slim K4 USB-C Charger (4-Bay)

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SLIM K4 Charger is a intelligent charger that with a Type-C USB charging port. It is compatible with Lithium IMR 3.6V/3.7V batteries: 10440, 14500, 16340, 17340, 18350, 18490, 18500, 18650, 26500, 26650, 20700, 21700. LED indicator will show you the status of charger: indicator turns blue in standby mode/full charged, white color in charging. SLIM K4 Charger is designed with some smart functions, such as auto-detect charging, monitors and charges each slot independently, low voltage smart activation recovery function, 0V activation recovery function. Besides, it is safe for you to use with built-in intelligent protection chip.

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Efest Lush Q4 Battery Charger
Efest Slim K2 Battery Charger


  •  LED indicator description
  •  Auto-detect charging
  •  Safe charging mode: CC & CV
  •  Safe and convenient USB charger (5V 2A)
  •  Monitors and charges each slot independently
  •  Low voltage smart activation recovery function
  •  Incredibly lightweight and conveniently portable
  •  Type-C USB charging port design
  •  Built-in intelligent protection chip
  •  0V activation recovery function
  •  High quality ABS fire-retardant material & electronic component
  •  Safety protections: Short Circuit/Automatic Over-charging/Automatic Over-discharging/Reverse Polarity/0V Activation Recovery/Hardware and Software Double Protection


  •  Efest SLIM K4 Charger
  •  Manual Card