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The Efest Slim K1 battery charger is an excellent, space saving and cost efficient universal battery charger. It’s perfect for travel and home alike. It has a micro USB slot which allows you to use it to charge other electric devices, such as phones, flashlights, e-cigs, etc. It provides separate bays which allows you to use different types of rechargeable batteries and prevents overcharging.

The Efest Slim K1 features a LED indicator which shows you the level of charge of each bay, and when the batteries are fully charged.

Several safety features have been included, such as reverse polarity and short circuit protection. Quite simply, this little dynamo is perfection with a plug.

Battery chargers have gradually improved, it’s true, but Efest pulled out all the stops to manufacture the perfect charger to make your life easier and more productive. Whether you are at home or away, the Efest Slim K1 is a must have for anyone who wants to recharges different batteries quickly and efficiently. Get yours today!


• Fast charging mode: 1.0A
• Fits various 3.6V and 3.7V Li-ion batteries
• Reverse polarity protection
• Activation function
• Auto-detect charging function
• Over-charging protection
• Short circuit protection
• CE and RoHS certified
• Spring made from piano wire provides a smooth sliding action when installing and removing the battery
• Steel cathode with low resistance and hard chromium plating achieves a more precise charging voltage
• AC input power: AC 100~240V 50/60Hz
• DC output power: DC 5V 1A
• Auto cut-off voltage: 4.20+/-0.5V
• Standby Current: <20mA
• Auto recharge voltage: 4.10+/-0.10V
• Storage temperature: 40-70 C
• DC input power: DC 5V 1A
• 1A CC current: 1000mA+/-10%
• CV cut-off current: ,100mA
• Activation current: 50mA~100mA
• Operation temperature: 0-40C


Kit Contents:

• 1 x Efest Slim K1 Charger
• 1 x USB Cable

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