Efest Slim K1 Intelligent Battery Charger

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Efest Slim K1 Intelligent Battery Charger


The Efest Slim K1 Intelligent Battery Charger is a single-slot battery charger, so you're able to charge one battery simultaneously at an aggressive speed.  The beauty behind the capability of this charger is that you're able to charge different battery types. While charging a single battery, the Slim K1 provides a charging current of 1A and re-powers the battery effortlessly and quickly. Not to be outdone, the top of each slot on the charger contains an active LED battery level indicator to provide the consistent status of the battery’s charge. The Slim K1 Charger is also equipped with features like Reverse-Polarity Protection, Short-Circuit Protection, and Overcharge Protection, to ensure the protection of your charger and the battery.



  • Number of Bays: 2
  • AC Input: 100V – 240V (50/60Hz)
  • DC Input: 5V (1A)
  • DC Output: 5V (1A)
  • Auto-Recharge Voltage: 4.10V
  • 1A CC Current: 1000mA
  • Cutoff Voltage: 4.2V
  • Standby Current: <20 mA
  • Activation Current: 50mA – 100mA
  • Compatible with: 10440, 16340, 14500, 14650, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 26500, and  26650


Note: Batteries are sold separately.