Efest Slim K4 USB-C Charger 4-Bay

The Efest Slim K4 is a compact and efficient 4-bay charger designed for lithium-ion rechargeable batteries. With USB-C input, it offers faster and more stable charging, making it ideal for vapers and hobbyists seeking a reliable charging solution.​

Specifications:

• Model: Efest Slim K4

• Input: DC 5V / 2A (USB-C)

• Output: DC 4.2V ±0.05V

• Charging Current: 0.5A per slot

• Charging Bays: 4 independent slots

• Battery Compatibility: 3.6V / 3.7V Li-ion batteries, including:

  • 10440, 14500, 16340 (RCR123), 16650, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 22650, 26650

• LED Indicators: Display charging progress for each battery

• Safety Features:

  • Overcharge protection

  • Reverse polarity protection

  • Short circuit protection

• Material: Fire-resistant ABS housing

• Dimensions: Approximately 98.5mm x 37mm x 37.5mm

• Weight: Approximately 400g (without batteries)​

Features:

• Charges up to four batteries simultaneously

• Automatically stops charging when complete

• Designed for optimal heat dissipation

• USB-C powered for versatile charging options​

Includes:

• 1 x Efest Slim K4 Charger

• 1 x USB-C Cable​

Usage Notes:

• Use with a USB wall adapter capable of delivering 5V / 2A output

• Always follow safety guidelines when charging batteries

• Do not use with damaged or incompatible batteries