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Efest Slim K4 ( 4 Bay ) USB Battery Charger

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Efest Slim K4 ( 4 Bay ) USB Battery Charger is a 4 bay battery charger for multiple battery sizes that Auto-detects charging currents. The charger features Low Voltage Smart Activation Recovery Function and is a safe and convenient USB charger.  

Features: 

  • 4 Battery Bays
  • USB Charger
  • Auto- Detect Charging Current
  • Low Voltage Smart Activation Recovery Function

Compatible Batteries:

18650

20700

21700

26650

and many more.