Each slot is independently monitored to provide the most effective. The LED indicates when the battery is charging and when the battery is fully charged.
The charger Slim K2 Efest has protection against polarity reversal , short-circuit, overload and many other safety features.
It has the ability to charge different types of batteries, lithium 3.6 V / 3.7 V widely used in the electronic cigarettes, flashlights, power tools and more