Efest SLIM K1 Intelligent USB Battery Charger – Single Bay

The Efest SLIM K1 is a compact, single-bay intelligent USB charger for compatible 3.6V and 3.7V rechargeable lithium-ion cells. Its spring-loaded bay charges at up to 1A and the LED indicator shows charging progress.

Product details

• Single charging bay


• Micro-USB input: DC 5V/1A


• Charging current: up to 1A


• Compatible with common cylindrical lithium-ion cells from 10440 to 26650, including 18650, 20700 and 21700


• LED charging-status indicator


• Reverse-polarity, short-circuit and overcharge protection


• Automatic charge cut-off

What is included

• 1 Efest SLIM K1 charger


• 1 Micro-USB cable


• User information

Rechargeable battery and wall adaptor are not included. Use only undamaged, compatible cells and observe the correct polarity.