Efest Slim USB Charger K1 + K2


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  • Efest Slim USB Charger K1 + K2
  • Efest Slim USB Charger K1 + K2
  • Efest Slim USB Charger K1 + K2

This variant is currently sold out.

This product does not contain nicotine.

Economy pricetag, quality performance. Efest have been around for quite the while now offering up some excellent chargers for the rest of us, while not compromising on their longevity, speed and build quality.

Charge your batteries quickly with the highly portable Efest Slim, available in K1 (single bay) or K2 (dual bay) configuration. Efest are well known for the high quality and low price of their chargers, and these little beauties are perfect for when you only need to charge a maximum of two cells at a time and portability is important to you.

Please note that the product photos show batteries inserted into the charging slots for demonstration purposes only; you will need to purchase batteries separately as none are included with the charger.


  • Compatible with: 10440, 14500, 14650, 16340, 16650, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 26500, 26650
  • Portable design with quality piano string internals
  • LED indicator light shows charging status
  • Single or dual slot
  • Micro USB powered
  • AC Input Power: AC 100~240V 50/60Hz
  • DC Output Power: DC 5V / 1A
  • DC Input Power: DC 5V / 1A
  • 1A CC Current: 1000mA (+/-10%)
  • Auto Cut-Off Voltage: 4.20 (+/-0.05V)
  • CV Cut-Off Current: <100mA
  • Standby Current: <20mA
  • Activation Current: 50mA~100mA
  • Auto Recharge Voltage: 4.10 (+/-0.10V)
  • Operation Temperature: 0C ~ 40C
  • Storage Temperature: -40C ~ 70C

What's in the box:

  • 1 x Efest Slim K Series Charger of your choice
  • 1 x Micro USB Cable
  • User Manual

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