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The Efest SLIM K4 USB-C Charger is a 4-bay intelligent charger with Type-C charging that accepts a wide range of battery sizes and features a quick charge mode. The SLIM K4 USB-C Charger is made of flame retardant ABS materials and features a Type-C Port on the rear for fast and safe charging. It can provide up to 2000mAh when used with two bays, with 1000mAh for each bay. Charging is limited to 500mAh per slot when all four bays are utilized. The Efest SLIM K4 is FCC, RoHS, and CE certified, and it’s packed with features that safeguard the charger, installed batteries, and user against failure.

*Battery Sold As A Single Pcs.

What is there:

  •  USB-powered LED indicator for convenience… (5V 2A), Type-C USB port
  • CC & CV Charging Modes
  • Compatible with a wide range of 3.6V and 3.7V lithium batteries
  • 2×1.0A/1×1.0A/4×0.5A/3×0.5A charging current auto-detect
  • Stops charging automatically when it’s finished, preventing batteries from being overcharged.
  • If you inadvertently insert a battery the wrong way, it has reverse polarity protection.
  • Features reverse polarity protection if you accidentally insert a battery the wrong way
  • 3-year warranty through Efest
Compatible with:
  • 3.6V/3.7V Lithium Ion IMR Batteries – 10440, 14500, 16340, 17340, 18350, 18490, 18500, 18650, 20700, 21700, 26500, 26650
  • Input – AC 100V-240V 50/60Hz or DC 5V 2A
  • Output – 4.2V +/-.05V
Kit box:
  • Efest SLIM K4 LED battery charger
  • USB cable
  • User Manual and Warranty Card
  • Scratch-off validation serial number
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