Efest K1 Slim Intelligent Battery Charger

The Efest K1 Slim charger is compatible with many battery cells and provides convenient charging wherever you go.

Compatible with Lithium IMR 3.6V/3.7V Batteries:
10440 | 14500 | 16340 | 17340
18650 | 18490 | 18500 | 18650
26500 | 26650 | 20700 | 21700

The lightweight and portable design makes it incredibly convenient but also stylish and eye-catching.

Fast charging mode: 1.0A | Reverse polarity protection
Activation function | Auto-detect charging function
Over-charging protection | Short circuit protection

The piano wire spring provides a smooth sliding action when installing and removing batteries. A low resistance and hard chromium-plated steel cathode achieves a more precise charging voltage.

Global support with technical support with FCC, CE, and RoHS certification

Please see our comprehensive guide to battery safety.