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Efest SLIM K4 Facts: 147 Specifications & 69 Highlights

Some chargers overpromise. But the Efest SLIM K4 charger brings real value with 147 practical specs & features — including general information, electrical & power, charging performance & ports & connectivity.

54 Points
Efest SLIM K4

Highlights 69

No extras. Just what matters.
54 Points

Why is Efest SLIM K4 better than other chargers ?

General Information

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Electrical & Power

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Charging Performance

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Ports & Connectivity

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Physical Dimensions & Weight

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Build Quality & Materials

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Safety & Protection Features

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Compatibility & Standards

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Thermal & Environmental Performance

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Usability & Convenience

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Durability & Reliability

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Energy & Efficiency Compliance

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Warranty & Support

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Quick Take

The essentials that matter—nothing extra

A fast snapshot of the Efest SLIM K4, covering its standout specification and what you can expect right out of the box.

Efest SLIM K4
Efest SLIM K4

The Efest SLIM K4 is a sleek and modern four-slot battery charger that utilizes a convenient USB Type-C port for flexible power options. It automatically detects your battery type and manages the current to ensure each cell is charged safely and efficiently. With its minimalist LED display and built-in safety features, it provides a hassle-free way to keep multiple batteries ready for your favorite electronics.

Specifications & Facts 147

Specs measured. Drama avoided.

Think you know gadgets? Check out the full scoop on the Efest SLIM K4 charger: specs, votes, pros, cons, and how it measures up to competing chargers.

General Information 15

Efest SLIM K4 Intended Use

What is the intended use of this charger?

21 Efest SLIM K4 0 Votes Home, Travel

22 Chargers in this range Home, Office, Travel

Efest SLIM K4
Efest SLIM K4

Intended uses for this charger include both home and travel, making it versatile for different environments.

Describes where and how the charger is primarily intended to be used.

Efest SLIM K4 Device Compatibility

What devices are compatible with this charger?

28 Efest SLIM K4 0 Votes Accessory

38 Chargers in this range Smartphone, Tablet, Laptop, Accessory

Efest SLIM K4
Efest SLIM K4

Compatible primarily with accessories, suggesting this charger is optimized for smaller or peripheral devices.

Indicates the types of devices the charger can power.

Efest SLIM K4 Installation Type

How is the charger installed?

23 Efest SLIM K4 0 Votes Plug-In

25 Chargers in this range Plug-In

Efest SLIM K4
Efest SLIM K4

Installation type is plug-in, meaning the charger connects directly to wall outlets without the need for hardwiring.

Describes how the charger is installed or connected.

Efest SLIM K4 Release Year

What year was this charger released?

58 Efest SLIM K4 0 Votes 2020

69 Chargers in this range 2024

Efest SLIM K4
Efest SLIM K4

This model was released in the year 2020, reflecting its design and feature set from that era.

The year the charger model was first released to market.

Efest SLIM K4 Product Name

What is the product name?

63 Efest SLIM K4 0 Votes Efest SLIM K4

61 Chargers in this range Anker 715

Official product name used to identify the charger model.

Efest SLIM K4 Charger Type

What type of charger is this?

13 Efest SLIM K4 0 Votes Wall Charger

22 Chargers in this range Wall Charger

Defines the primary charger category based on form and usage.

Electrical & Power 19

Efest SLIM K4 Minimum Output Power

What is the minimum output power?

5 Watt 0 Votes
Efest SLIM K4
9.77 Watt (Average)

Efest SLIM K4
Efest SLIM K4

Minimum output power is 5 W, sufficient for charging smaller devices.

The lowest stable power output supported by the charger.

Efest SLIM K4 Input Voltage

What input voltage does it support?

5 Volt 0 Votes
Efest SLIM K4
85.12 Volt (Average)

Efest SLIM K4
Efest SLIM K4

Input voltage is 5 V, standard for USB charging, ensuring compatibility with globally available power sources.

The voltage range required from the power source to operate safely.

Efest SLIM K4 Input Current

How much input current does it draw?

2 A 0 Votes
Efest SLIM K4
1.64 A (Average)

Efest SLIM K4
Efest SLIM K4

Input current is 2 A, matching the output current for efficient power transfer.

The amount of current drawn from the power source during operation.

Efest SLIM K4 Output Current

What is the output current?

2 A 0 Votes
Efest SLIM K4
2.82 A (Average)

Efest SLIM K4
Efest SLIM K4

Output current is 2 A, which supports a steady and moderately fast charging rate for compatible devices.

The maximum current delivered to devices for charging.

Efest SLIM K4 Input Frequency

What input frequency is supported?

50 Hz 0 Votes
Efest SLIM K4
45.08 Hz (Average)

Efest SLIM K4
Efest SLIM K4

The input frequency is 50 Hz, matching standard AC power frequency in many countries.

The electrical frequency range the charger can accept.

Efest SLIM K4 Maximum Output Power

What is the maximum output power?

5 Watt 0 Votes
Efest SLIM K4
31.03 Watt (Average)

The highest total power the charger can deliver to connected devices.

Charging Performance 14

Efest SLIM K4 Simultaneous Device Charging

How many devices can be charged simultaneously?

43 Efest SLIM K4 0 Votes 4

12 Chargers in this range 2

Efest SLIM K4
Efest SLIM K4

It supports charging 4 devices simultaneously, matching its total number of ports for maximum utility.

The maximum number of devices that can be charged at the same time.

Efest SLIM K4 Power Distribution Method

How is power distributed?

73 Efest SLIM K4 0 Votes Dynamic

46 Chargers in this range Dynamic

Efest SLIM K4
Efest SLIM K4

Power distribution method is dynamic, optimizing charging currents across ports for efficient usage.

Describes how power is allocated across multiple ports.

Efest SLIM K4 Full Charge Time Estimate

How long does a full charge take?

0 Efest SLIM K4 0 Votes 6 Hours

35 Chargers in this range 2 hours

Efest SLIM K4
Efest SLIM K4

Full charge time is estimated at 6 hours, indicating the typical duration to charge devices fully using this charger.

Estimated time required to fully charge a typical device.

Efest SLIM K4 Charging Speed

What is the charging speed category?

26 Efest SLIM K4 0 Votes Standard

56 Chargers in this range Fast

Classifies overall charging speed based on supported power and protocols.

Efest SLIM K4 Maximum Charging Speed

What is the maximum charging speed?

10 Watt 0 Votes
Efest SLIM K4
29.49 Watt (Average)

The highest charging power delivered to a single device.

Efest SLIM K4 Intelligent Power Allocation

Does it allocate power intelligently?

Yes 0 Votes Efest SLIM K4

Yes Chargers in this range

Automatically adjusts power delivery based on connected devices.

Ports & Connectivity 16

Efest SLIM K4 Total Ports

How many total ports does the charger have?

63 Efest SLIM K4 0 Votes 4

22 Chargers in this range 1

Efest SLIM K4
Efest SLIM K4

The charger offers a total of 4 ports, allowing simultaneous charging of multiple devices.

Total number of output ports available for charging devices.

Efest SLIM K4 Port Placement

Where are the ports located?

73 Efest SLIM K4 0 Votes Front

65 Chargers in this range Front

Efest SLIM K4
Efest SLIM K4

Ports are placed at the front, providing easy access for connecting devices.

Location of charging ports on the charger body.

Efest SLIM K4 Connector Type

What connector types are supported?

83 Efest SLIM K4 0 Votes USB-C

65 Chargers in this range USB-C

Efest SLIM K4
Efest SLIM K4

USB-C is the connector type used, allowing for compatibility with modern devices and fast charging capabilities.

Types of connectors supported by the charger.

Efest SLIM K4 Cable Length

How long is the charging cable?

3 ft 0 Votes
Efest SLIM K4
2.66 ft (Average)

Efest SLIM K4
Efest SLIM K4

The cable length is 3 ft, equivalent to approximately 0.91 m, offering convenient reach without excess clutter.

Length of the included charging cable.

Efest SLIM K4 USB-C Ports

How many USB-C ports does it have?

0 Efest SLIM K4 0 Votes 0

56 Chargers in this range 1

Number of USB-C output ports for modern devices.

Efest SLIM K4 Wireless Charging

Does it support wireless charging?

No 0 Votes Efest SLIM K4

Yes Chargers in this range

Indicates whether the charger supports wireless charging.

Physical Dimensions & Weight 2

Efest SLIM K4 Cable Thickness

How thick is the cable?

0.2 inch 0 Votes
Efest SLIM K4
0.21 inch (Average)

Efest SLIM K4
Efest SLIM K4

Cable thickness measures 0.2 inch, which is approximately 0.51 cm, balancing durability and flexibility.

Thickness of the charging cable, affecting durability and flexibility.

Efest SLIM K4 Travel Size Classification

Is this charger travel-sized?

63 Efest SLIM K4 0 Votes Compact

62 Chargers in this range Compact

Overall size category based on dimensions and portability.

Build Quality & Materials 11

Efest SLIM K4 Housing Material

What is the housing material?

33 Efest SLIM K4 0 Votes Plastic

39 Chargers in this range Plastic

Efest SLIM K4
Efest SLIM K4

The charger housing is made of plastic, providing a lightweight and cost-effective enclosure.

Primary material used for the outer charger casing.

Efest SLIM K4 Fire-Retardant Rating

What is the fire-retardant rating?

93 Efest SLIM K4 0 Votes V-0

84 Chargers in this range V-0

Efest SLIM K4
Efest SLIM K4

Fire-retardant rating V-0 indicates the material self-extinguishes quickly, offering high fire safety.

Fire safety rating of the charger materials.

Efest SLIM K4 Plug Material

What material is the plug made of?

58 Efest SLIM K4 0 Votes Plastic, Metal

55 Chargers in this range Metal

Material used for the plug prongs and structure.

Efest SLIM K4 Port Reinforcement

Are the ports reinforced?

0 Efest SLIM K4 0 Votes Standard

28 Chargers in this range Standard

Indicates whether charging ports are reinforced for durability.

Efest SLIM K4 Heat-Resistant Materials

Does it use heat-resistant materials?

Yes 0 Votes Efest SLIM K4

Yes Chargers in this range

Uses materials designed to withstand high temperatures safely.

Efest SLIM K4 Surface Finish

What is the surface finish?

53 Efest SLIM K4 0 Votes Matte

52 Chargers in this range Matte

External surface finish affecting grip and aesthetics.

Safety & Protection Features 15

Efest SLIM K4 Safety Redundancy Level

What is the safety redundancy level?

93 Efest SLIM K4 0 Votes Multi-Layer

79 Chargers in this range Multi-Layer

Efest SLIM K4
Efest SLIM K4

Safety redundancy is multi-layered, providing enhanced protection against electrical faults and failures.

Indicates the number of safety systems working together.

Efest SLIM K4 Child Safety Shutter

Is there a child safety shutter?

No 0 Votes Efest SLIM K4

Yes Chargers in this range

Prevents accidental insertion of objects into live ports.

Efest SLIM K4 Safety Certification Level

What is the safety certification level?

43 Efest SLIM K4 0 Votes Basic

61 Chargers in this range Enhanced

Overall strength of safety certifications achieved.

Efest SLIM K4 Overheat Protection

Does it have overheat protection?

Yes 0 Votes Efest SLIM K4

Yes Chargers in this range

Automatically reduces or shuts off power when excessive heat is detected.

Efest SLIM K4 Temperature Monitoring

Is temperature actively monitored?

Yes 0 Votes Efest SLIM K4

Yes Chargers in this range

Continuously monitors internal temperature during operation.

Efest SLIM K4 Fire Protection

Does it include fire protection?

Yes 0 Votes Efest SLIM K4

Yes Chargers in this range

Built-in measures to reduce fire risk during electrical faults.

Compatibility & Standards 12

Efest SLIM K4 Cross-Brand Compatibility

How broad is cross-brand compatibility?

63 Efest SLIM K4 0 Votes Wide

80 Chargers in this range Universal

Efest SLIM K4
Efest SLIM K4

Cross-brand compatibility is wide, meaning it can safely charge devices from many different manufacturers.

Level of compatibility across different device brands.

Efest SLIM K4 USB Power Delivery

Does it support USB Power Delivery?

No 0 Votes Efest SLIM K4

Yes Chargers in this range

Indicates support for the USB Power Delivery standard for fast and flexible charging.

Efest SLIM K4 Quick Charge

Does it support Quick Charge?

No 0 Votes Efest SLIM K4

Yes Chargers in this range

Indicates compatibility with Qualcomm Quick Charge technology.

Efest SLIM K4 PPS

Does it support PPS?

No 0 Votes Efest SLIM K4

Yes Chargers in this range

Supports Programmable Power Supply for efficient fast charging.

Efest SLIM K4 Apple Charging

Is it compatible with Apple devices?

No 0 Votes Efest SLIM K4

Yes Chargers in this range

Optimized compatibility with Apple devices and charging requirements.

Efest SLIM K4 Android Charging

Is it compatible with Android devices?

No 0 Votes Efest SLIM K4

Yes Chargers in this range

Ensures compatibility with Android devices and charging protocols.

Thermal & Environmental Performance 10

Efest SLIM K4 Storage Temperature Range

What is the storage temperature range?

43 Efest SLIM K4 0 Votes -4–140°F

51 Chargers in this range -4–140°F

Efest SLIM K4
Efest SLIM K4

The specified storage temperature is from -4°F to 140°F, which converts to approximately -20°C to 60°C.

This wide range ensures the charger can be safely stored in varied conditions without damage.

Temperature range safe for storing the charger when not in use.

Efest SLIM K4 Thermal Dissipation Method

How does it dissipate heat?

0 Efest SLIM K4 0 Votes Passive

0 Chargers in this range Passive

Efest SLIM K4
Efest SLIM K4

Thermal dissipation method is passive, relying on natural heat dissipation without fans, reducing noise and maintenance.

Method used to release heat during operation.

Efest SLIM K4 Ambient Temperature Tolerance

How tolerant is it to ambient temperatures?

33 Efest SLIM K4 0 Votes Medium

42 Chargers in this range Medium

Efest SLIM K4
Efest SLIM K4

Supports devices within a medium range of ambient operating temperatures for safe and efficient performance.

Ability to perform in varying ambient temperatures.

Efest SLIM K4 Operating Temperature Range

What is the operating temperature range?

43 Efest SLIM K4 0 Votes 32–104°F

48 Chargers in this range 32–104°F

The temperature range within which the charger operates safely.

Efest SLIM K4 Internal Cooling Design

What internal cooling design is used?

33 Efest SLIM K4 0 Votes Heat Sink

30 Chargers in this range Heat Sink

Internal structure designed to manage heat.

Efest SLIM K4 Fanless Design

Is the charger fanless?

Yes 0 Votes Efest SLIM K4

Yes Chargers in this range

Indicates whether cooling is achieved without a fan.

Usability & Convenience 12

Efest SLIM K4 Plug Orientation

What is the plug orientation?

13 Efest SLIM K4 0 Votes Straight

16 Chargers in this range Straight

Efest SLIM K4
Efest SLIM K4

The plug orientation is straight, which impacts how the charger fits in outlets and spaces.

Orientation of the plug relative to the charger body.

Efest SLIM K4 Cable Management

How is the cable managed?

73 Efest SLIM K4 0 Votes Detachable

47 Chargers in this range External

Efest SLIM K4
Efest SLIM K4

Cable management is facilitated with a detachable cable, allowing for easier storage and replacement.

How the charging cable is managed when not in use.

Efest SLIM K4 Setup Complexity

How complex is setup?

43 Efest SLIM K4 0 Votes Plug-and-Play

41 Chargers in this range Plug-and-Play

Efest SLIM K4
Efest SLIM K4

Setup complexity is plug-and-play, enabling users to start charging without complicated installation.

Effort required to start using the charger.

Efest SLIM K4 LED Indicators

Does it have LED indicators?

Yes 0 Votes Efest SLIM K4

Yes Chargers in this range

Presence of LED lights to show charging or power status.

Efest SLIM K4 Foldable Plug

Does it have a foldable plug?

No 0 Votes Efest SLIM K4

Yes Chargers in this range

Indicates whether the plug can fold for easier storage and travel.

Efest SLIM K4 Indicator Behavior

How do the indicators behave?

63 Efest SLIM K4 0 Votes Color-Coded

33 Chargers in this range Solid

How indicator lights behave during operation.

Durability & Reliability 9

Efest SLIM K4 Manufacturing Quality Level

What is the manufacturing quality level?

43 Efest SLIM K4 0 Votes Standard

53 Chargers in this range Premium

Efest SLIM K4
Efest SLIM K4

Manufacturing quality is rated as standard, ensuring reliable performance and durability consistent with typical industry expectations.

Overall manufacturing quality classification.

Efest SLIM K4 Rated Lifespan

How long is the rated lifespan?

93 Efest SLIM K4 0 Votes Long

71 Chargers in this range Long

Expected operational lifespan of the charger under normal usage conditions.

Efest SLIM K4 Mean Time Between Failures

How reliable is the charger over time?

93 Efest SLIM K4 0 Votes High

73 Chargers in this range High

Average reliability level indicating how often failures are expected.

Efest SLIM K4 Plug Insertion Cycles

How durable is the plug connection over time?

43 Efest SLIM K4 0 Votes Medium

70 Chargers in this range High

Indicates how many plug-in and unplug cycles the charger connector is designed to withstand before wear affects performance.

Efest SLIM K4 Port Wear Resistance

How resistant are the ports to wear?

43 Efest SLIM K4 0 Votes Medium

65 Chargers in this range High

Resistance of charging ports to wear over time.

Efest SLIM K4 Cable Flex Cycles

How durable is the charging cable under repeated bending?

43 Efest SLIM K4 0 Votes Medium

43 Chargers in this range Medium

Indicates how many bending cycles the charging cable can withstand before performance degradation.

Energy & Efficiency Compliance 8

Efest SLIM K4 Energy Efficiency Rating

What is the energy efficiency rating?

43 Efest SLIM K4 0 Votes Medium

78 Chargers in this range High

Overall classification of how efficiently the charger converts power.

Efest SLIM K4 Energy Star Compliance

Is it Energy Star compliant?

No 0 Votes Efest SLIM K4

Yes Chargers in this range

Indicates compliance with Energy Star efficiency standards.

Efest SLIM K4 Standby Efficiency

How efficient is the charger in standby mode?

43 Efest SLIM K4 0 Votes Medium

77 Chargers in this range High

Indicates how efficiently the charger uses power while plugged in but not actively charging.

Efest SLIM K4 Eco Mode

Does it support eco mode?

No 0 Votes Efest SLIM K4

Charger in this range Who knows? (Help us out by suggesting one!)

Reduces power consumption when full charging is not required.

Efest SLIM K4 Power Loss Rating

How much power is lost during operation?

43 Efest SLIM K4 0 Votes Medium

76 Chargers in this range Low

Indicates the amount of input power lost during conversion and operation.

Efest SLIM K4 Green Materials Usage

Are green materials used?

No 0 Votes Efest SLIM K4

Yes Chargers in this range

Uses environmentally friendly or recycled materials.

Warranty & Support 4

Efest SLIM K4 Warranty Length

How long is the warranty?

33 Efest SLIM K4 0 Votes 1 Year

31 Chargers in this range 1 Year

Efest SLIM K4
Efest SLIM K4

The warranty length is 1 year, offering a limited period of manufacturer coverage against defects.

Duration of warranty coverage provided with the charger.

Efest SLIM K4 Customer Support Availability

When is customer support available?

43 Efest SLIM K4 0 Votes Business Hours

43 Chargers in this range Business Hours

Efest SLIM K4
Efest SLIM K4

Customer support is available during business hours, providing assistance when needed within standard times.

Availability of customer support services.

Efest SLIM K4 Support Channels

What support channels are available?

43 Efest SLIM K4 0 Votes Email, Online Portal

39 Chargers in this range Email, Online Portal

Ways users can contact customer support.

Efest SLIM K4 Replacement Policy

What is the replacement policy?

63 Efest SLIM K4 0 Votes Standard Returns

53 Chargers in this range Standard Returns

Defines the terms under which a defective or faulty charger can be replaced.

Surveys

Because hot takes deserve votes.

Efest SLIM K4 Charging Speed

How satisfied are you with the charging speed of this chargers when powering everyday devices?

Extremely fast charging — Under 1 hour 0 Votes
Very fast charging — 1 to 2 hours 0 Votes
Decent charging speed — 2 to 4 hours 0 Votes
Slow charging — 4 to 6 hours 0 Votes
Very slow charging — Over 6 hours 0 Votes

Efest SLIM K4 Power Output Performance

How well does this chargers provide enough power for phones, tablets, or laptops?

Handles high-demand devices easily — 65 watts or more 0 Votes
Strong and reliable output — 45 to 64 watts 0 Votes
Good for most daily devices — 25 to 44 watts 0 Votes
Limited power capability — 10 to 24 watts 0 Votes
Very weak power delivery — Under 10 watts 0 Votes

Efest SLIM K4 Durability and Build Quality

How durable does this chargers feel during long-term daily use?

Feels built to last a long time — Over 5 years 0 Votes
Very solid and dependable — 3 to 5 years 0 Votes
Decently built for regular use — 2 to 3 years 0 Votes
Feels somewhat fragile — 1 to 2 years 0 Votes
Breaks down too quickly — Under 1 year 0 Votes

Efest SLIM K4 Portability and Size

How easy is it to carry this chargers for travel or commuting?

Ultra compact and pocketable — Under 3 ounces 0 Votes
Light and travel friendly — 3 to 5 ounces 0 Votes
Moderately easy to carry — 5 to 7 ounces 0 Votes
Somewhat bulky — 7 to 10 ounces 0 Votes
Heavy and inconvenient — Over 10 ounces 0 Votes

Efest SLIM K4 Heat Management

How well does this chargers control heat during extended charging sessions?

Stays cool even under heavy use — Under 90 degrees Fahrenheit 0 Votes
Gets slightly warm — 90 to 100 degrees Fahrenheit 0 Votes
Noticeably warm to the touch — 100 to 110 degrees Fahrenheit 0 Votes
Runs quite hot — 110 to 120 degrees Fahrenheit 0 Votes
Uncomfortably hot — Over 120 degrees Fahrenheit 0 Votes

Efest SLIM K4 Ease of Use

How easy is it to use this chargers on a daily basis?

Effortless and intuitive — No learning needed 0 Votes
Very easy to understand — Minimal effort 0 Votes
Takes a little getting used to — Some adjustment 0 Votes
Slightly confusing at times — Requires patience 0 Votes
Frustrating to use — Feels complicated 0 Votes

Efest SLIM K4 Setup Experience

How smooth is the initial setup experience with this chargers?

Instantly ready to use — Plug and charge 0 Votes
Quick and simple setup — Less than 1 minute 0 Votes
Setup takes some attention — A few minutes 0 Votes
Setup feels awkward — Several minutes 0 Votes
Setup feels annoying — Too many steps 0 Votes

Efest SLIM K4 Design and Visual Appeal

How attractive does the design of this chargers look in everyday environments?

Sleek and modern look — Feels premium 0 Votes
Clean and stylish design — Looks nice 0 Votes
Simple and acceptable — Nothing special 0 Votes
Somewhat unattractive — Feels dated 0 Votes
Cheap-looking design — Not appealing 0 Votes

Efest SLIM K4 Noise and Comfort

How comfortable is this chargers to use in quiet environments?

Completely silent operation — No noise at all 0 Votes
Almost silent — Barely noticeable 0 Votes
Occasionally noticeable — Slight sound 0 Votes
Clearly noticeable noise — Can be distracting 0 Votes
Annoyingly loud — Very disruptive 0 Votes

Efest SLIM K4 Pricing and Value

How do you feel about the price of this chargers compared to what it offers?

Great value for money — Totally worth it 0 Votes
Pretty good price — Feels reasonable 0 Votes
Fair deal overall — Acceptable cost 0 Votes
Kinda pricey — Feels expensive 0 Votes
Crazy expensive — Not worth it 0 Votes

Guides 1

Yes, we brought proof.

Files 1

Efest SLIM K4 Owner’s Guide

tme.eu
tme.eu

Reviews 0

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