Efest Slim K1 1A Battery Charger

Efest Slim K1 battery charger: convenient charging

The Efest Slim K1 charger is a compact way to charge removable batteries used in e-cigarettes and electronic pipes. Its single charging bay and automatic operation make it convenient both at home and when travelling.

Designed for rechargeable 3.6 V or 3.7 V lithium-ion batteries, it supports a range of sizes, including 18350, 18650 and 21700.

A compact, intelligent charger

The Efest Slim K1 combines straightforward operation with electronic safety features. It detects the inserted battery and controls charging at a maximum current of 1 A.

• One charging bay: charges one battery at a time.
• Maximum charging current: 1 A: for compatible batteries.
• LED indicator: displays charging status.
• Automatic detection: no manual setting required.
• Overcharge protection: automatic end-of-charge control.
• Short-circuit protection: built-in electronic safeguard.
• Reverse-polarity protection: helps protect against incorrect battery insertion.
• Compact design: easy to transport and store.

Which batteries are compatible with the Efest Slim K1?

The Slim K1 is designed for compatible rechargeable 3.6 V or 3.7 V lithium-ion batteries in the following sizes:

• batteries 10440
• batteries 14500
• batteries 16340
• batteries 17340
• batteries 18350
• batteries 18490
• batteries 18500
• batteries 18650
• batteries 20700
• batteries 21700
• batteries 26500
• batteries 26650

Important: Always check your battery’s compatibility with the charger and its manufacturer’s permitted charging current.

For e-cigarettes and electronic pipes

The Efest Slim K1 is suitable for e-cigarette users who use compatible removable batteries. It is also useful for electronic pipes powered by 18350 or 18650 batteries.

It can be used with Créavap handcrafted electronic pipes fitted with compatible removable batteries. Its compact size makes it easy to keep with your charging accessories.

Efest Slim K1 technical specifications

• Brand: Efest
• Model: Slim K1
• Type: Intelligent external battery charger
• Charging bays: 1
• Power input: USB 5 V
• Maximum charging current: 1 A
• Compatible batteries: rechargeable Li-ion, 3.6 V / 3.7 V
• Charge termination voltage: 4.20 V ± 0.05 V
• Indicator: LED
• Protections: overcharge, short circuit and reverse polarity

How to use the Efest Slim K1 charger

1. Connect the charger to a suitable USB 5 V power source using the supplied cable.
2. Insert a compatible battery, observing the positive (+) and negative (-) markings.
3. Check the LED indicator to confirm that charging has started.
4. Monitor the charging process and remove the battery when charging is complete.
5. Disconnect the charger after use.

What is included in the box?

• 1 Efest Slim K1 charger
• 1 USB charging cable
• Manufacturer documentation, depending on packaging

Please note: Battery and mains power adapter are not included.

Safety precautions

Use only compatible rechargeable batteries in good condition, with intact insulating wraps. Never charge a damaged, deformed or otherwise faulty battery.

Observe the charging-current limit specified by the battery manufacturer, particularly for smaller battery sizes. Do not leave a battery charging unattended or overnight. Keep the charger away from water, excessive heat and flammable materials.

FAQ: Efest Slim K1 battery charger