The Efest Slim K2 charger is a straightforward, lightweight charger designed for li-ion batteries and powered by a micro-USB connection. It can charge two batteries simultaneously with up to 1A per battery, depending on the power source. The charging process is indicated by a white LED, while a blue LED signifies that charging is complete.

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This charger includes several safety features, such as over-current, over-voltage, short-circuit, and reverse polarity protection. It is constructed with a piano wire spring that ensures a smooth sliding action and has undergone over 15,000 tensile tests. Additionally, its chromium-plated steel cathode helps to maintain low resistance and deliver a more accurate charging voltage.

Compatible Batteries: Fogstar Energy 18650 3800 mAh Battery

BATTERY TIPS:

Keep batteries in a safe place when not in use 
Never leave chargers plugged in overnight
Never leave charging batteries unattended
Keep away from water

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DC Input: 5V 2A
Output current: 1A x 2
Auto cut-off voltage: 4.2V+-0.05V
Auto recharge voltage: 4.10+-0.1V

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Efest SLIM K2 2 battery charger

Micro USB Cable