EFest Slim K4 Quad USB-C Battery Charger is the newest charger in the K series from  EFest.

Boasting 4 channels of USB-C charging capability and auto smart cut off, the Slim K4 is capable of charging at either 1A per channel with 2 batteries or 0.5A using 4 channels. The smart indicator light lets you know when the cell is in charging status. The indicator turns a solid white colour to alert you the battery has finished the charging cycle.



  • Input Power – DC 2A
  • Auto Cut Off Voltage – 4.2
  • Activation Current 50ma
  • Operation Temperature 0-40 Degrees Celsius
  • ABS Fire Retardant Construction
  • Springs Tested 15,000 Times For Life
  • 6 Levels Of Safety Protection

In The Box:

  • 1x EFEST SLIM K4 Charger
  • 1x USB-C Power Cable
  • 1x User Guide
  • 1x Warranty Card.

Efest K4 Slim Battery Charger