The Efest SLIM K2 Intelligent Battery Charger is a reliable and efficient charging solution for your rechargeable batteries. Designed with convenience and safety in mind, this charger features dual charging slots and a Micro USB input, allowing you to charge your batteries with ease.

Each slot in the Efest SLIM K2 Charger is monitored independently, providing a more efficient and accurate charge for your batteries. With a charging current of 1A, this charger delivers a balanced and timely charging process to ensure optimal battery performance.

The LED indicator on the charger keeps you informed of the charging status. It illuminates when your battery is charging and turns off when the battery is fully charged, providing a clear visual cue for your convenience.

Safety is a top priority with the Efest SLIM K2 Charger. It incorporates various protection features, including reverse polarity protection, short circuit protection, and overcharge protection, ensuring the safety of both your batteries and the charger itself. You can charge your batteries with peace of mind, knowing that they are being handled with care.

The Efest SLIM K2 Charger is compatible with a wide range of 3.6V/3.7V lithium batteries commonly used in electronic cigarettes, flashlights, electric tools, and more. Whether you need to charge batteries for your vape mod, flashlight, or other devices, this charger is a versatile solution that can meet your needs.

Warning:  Misusing or mishandling lithium-ion batteries can pose a SERIOUS RISK of property damage, personal injury, or even death. They are not supposed to be used outside of a fully protected battery pack and you use them at your own risk. Never exceed the battery’s true continuous current rating and keep the plastic wrap and top insulating ring in perfect condition.


  • Compatible with: 10440, 14500, 14650, 16340, 16650, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 26500, 26650
  • Portable Design
  • Battery Life LED Indicator Light
  • Dual Slot 5V/1A Micro USB Charger
  • 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

Package Contents

1 x Efest Slim K2 Charger
1 x Micro USB Cable

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