Description
The Efest Slim K2 is a lightweight, no-frills micro-USB powered Li-ion battery charger designed to charge two cells simultaneously. It delivers up to 1A of charging current per slot, depending on the power supply, with clear white and blue LED indicators to show charging status.
Engineered with safety in mind, it features reverse polarity, over-current, over-voltage, and short-circuit protection. The durable piano wire spring ensures a smooth sliding action tested over 15,000 times, while the chromium-plated steel cathode ensures low resistance. It is compatible with a wide range of cells including 18650, 20700, 21700, 26650, 10440, and 14500.