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Efest Slim K2 Battery Charger


Efest Slim K2 Battery Charger


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Artisan Vapor & CBD is the leading manufacturer of chargersin the USA. The Efest Slim K2 Charger is a dual slot charger with a Micro USB input and charges at 2A. Each slot is monitored independently to provide the most efficient charge. The LED indicates when your battery is charging and when the battery is fully charged. The Efest Slim K2 Charger features reverse polarity, short circuit, overcharge protection and many more safety features. The Efest Slim K2 Charger can charge different types of 3.6V/3.7V lithium batteries.



  • 2 battery slots
  • DC Input: 5V (2A)
  • DC Output: 5V (2A)
  • Auto-Recharge Voltage: 4.10V
  • 1A CC Current: 1000mA
  • Cutoff Voltage: 4.2V
  • Standby Current: <20 mA
  • Activation Current: 50mA – 100mA



  • IMR 3.6V / 3.7 V Batteries
  • Li-ion 26650, 26500, 21700, 20700, 18650, 18500, 18490, 18350, 17340, 16340, 14500, 10440



  • 1 Efest SLIM K2 Battery Charger
  • 1 USB charging cable


WARNING:  Please read battery specifications before charging for compatibility with SLIM K2. If not used correctly, it may cause damage to the battery or the charger. DO NOT use SLIM K2 in inflammable or explosive enviroment. Please use SLIM K2 in a dry enviroment. Please take out the battery and unplug the adapter or car charger while not in use. Keep SLIM K2 out of reach of children. Please be sure the voltage range matches with the SLIM K2 under USB output mode. Please clean to maintain the cleanness of the positive and negative contact to deter foreign objects and prevent poor contact. DO NOT charge battery if the battery’s wrapper is damaged to prevent explosion or leakage. NEVER leave a charging charger in your car unattended. Misusing or mishandling chargers can pose a SERIOUS RISK to personal injury, property damage, or death. 

Additional information

Weight0.5 kg
Dimensions8.5 × 5.25 × 1.5 cm


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