Efest Slim K4 Charger

Cost-effective and easy to use, the Efest SLIM K4 Charger is incredibly lightweight and conveniently portable.

Steel cathodes with low resistance and hard chromium plating processing to achieve a more precise charging voltage.

Ultra-compatible with a variety of 3.6v/3.7 lithium batteries

• 10440
• 14500
• 16340
• 17340
• 18350
• 18490
• 18500
• 18650
• 26500
• 20700
• 21700

Features 

• Auto-detect charging current: 2 x1.0A/ 1 x 1.0A/4. x0.5A/3 x 0.4A
• Safe Charging mode
• Safe and convenient USB charger (5V 2A)
• low Voltage smart activation recovery function
• Incredibly lightweight and conveniently portable