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Efest Slim K1 Single Bay Battery Charger

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The Efest Slim K1 Single Bay Battery Charger is an intelligent battery charger capable of charging a single cell. The battery bay utilises a spring made from piano wire to provide a smooth sliding action when installing and removing batteries. As with all their devices Efest has included a vivid and intuitive LED display, which shows the user when batteries are charging and when they are fully charged with auto stop functionality. The Efest Slim K1 Charger features reverse polarity, short circuit, overcharge protection and many more safety features. Check out our range of rechargeable batteries and vape on!

Compatible with: 10440, 14500, 14650, 16340, 16650, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 26500, 26650

Please Note: No batteries are include with this charger. Batteries can be purchased separately from our accessories page or by following this link. 

Kit Contents:

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


• 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

Compatible with 18650 vaping mod batteries. Also Compatible with 10440/14500/14650/16340/17335/17500/17670/18350/18490/18500/18650/18700/20700/21700/22650/25500/26650 3.6V/3.7V Li-ion batteries

For warranty information see our terms & conditions page.



We only ship orders to UK and operate a Same Day Dispatch (99% of the time, sometimes delays may occur) on all orders placed before 4pm on working days (Monday to Friday excluding weekends & Bank Holidays). Any orders placed after 4pm cut off on weekdays (Monday to Friday) or over weekends, will be dispatched the next WORKING day. We do not dispatch goods over weekends or bank holidays and do not offer delivery on Bank Holidays.

When you place an order, we will estimate a delivery date for you based on the shipping method you have chosen. This is an estimation only and is not guaranteed delivery date. All orders are shipped in discreet packaging.

You may return most new unopened items (excluding e liquids) within 14 days of delivery for a full refund excluding our postage costs we have incurred. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect item etc.). If the item is reported as defective, we will check item for issue/fault before deeming it faulty.

You should expect to receive your refund within 7 working days of the return arriving with us and being deemed faulty, however, in many cases you will receive a refund more quickly. This time period includes the product testing and the time it takes your bank to process our refund request (3 to 5 working days).

If you need to return an item, please Contact Us with your order number and details about the product you would like to return. We will respond quickly with instructions for how to return items from your order.

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