EFEST® Slim K1 & K2 | Battery Charger | 18650 20700 21700- BATTERY OPTION

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Genuine Efest Slim K1 Li-ion Charger  For 18650 18500 18350 26500 26650

Portable Car USB connection with 1 slot NEW

Batteries which are Provided are Samsung 18650 25R batteries 

  • Quickly charge your batteries
  • On the go, quick charging universal battery charger is great to keep on hand
  • Never be stuck with dead flashlight batteries again
  • Compact, versatile, and durable means you can throw it in your bag/car, and take it with you anywhere
  • Charges a whole range of batteries and connects to any USB port

Efest Slim K1 is a professional portable one slot Li-ion Battery charger with a Micro USB charging port. Packed into its incredibly small body making it highly portable and yet has every function you would expect in a smart charger, from fast charging to reverse polarity protection. A quality yet trendy looking charger for customers on the go, the Efest Slim K2 will not let you down.


  • Convenient LED Indicator
  • 1A fast charge
  • Accepts 3.6V or 3.7V batteries of various sizes
  • Reverse polarity protection
  • Auto-detect charging
  • Over-charge protection
  • Short circuit protection
  • Micro USB to USB Connection making this very portable!
  • Compatible with: 20700,26650,18650,18500,18350,17340,16340,14500,10440,26500


  • AC input power: AC 100-240V 50/60Hz
  • DC output power: DC 5V 1A
  • Auto cut-off voltage: 4.1 +/- 0.10V
  • Storage Temperature: -40°C +70°C
  • DC input power: DC 5V 1A
  • 1A CC current: 1000mA +/- 10%
  • CV cut-off current

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