Micro USB

Ross Jukes
Last updated: May 20, 2024
Why Trust Us
Our editorial policy emphasizes accuracy, relevance, and impartiality, with content crafted by experts and rigorously reviewed by seasoned editors for top-notch reporting and publishing standards.
Purchases via our affiliate links may earn us a commission at no extra cost to you, and by using this site, you agree to our terms and privacy policy.

Tech is constantly changing, and the way we connect and power our devices has come a long way. One of the most impactful developments to date has been the Micro USB connector. A small, easy-to-use interface that’s played an enormous role in standardizing battery charging and data transfer for portable devices. In this article, we’ll be diving deep into the world of Micro USB. Looking at what it is, how it works and why it’s changed so much about mobile technology.

What is Micro USB?

What is Micro USB

Micro USB is a type of Universal Serial Bus (USB) connector that was designed specifically to support the capabilities of USB 2.0. This allows users to transfer up to 480 Mbps of data between devices with ease. Its main feature is its ability to both charge batteries and transfer data using just one cable, all in a compact package.

When you think about how far mobile technology has come since its inception, it’s hard not to appreciate Micro USB for what it does.

Different Types Of Micro USB Connectors

There are two types of Micro USB connectors: Micro-A and Micro-B.

  • The less popular version, Micro-A is typically used in OTG (On-The-Go) devices so they can easily change roles between host and peripheral tasks.
  • Micro-B on the other hand, is used more often than not for smartphones, tablets and other devices when connecting them to a computer or charger.

It may look like a dying breed now that Type-C has made its grand entrance into the market but don’t count out old faithful just yet – she still holds her own today in budget-friendly gadgets as well as some very specialized electronic systems.

How Does it Work?

At its core, a micro-USB connects your device or gadget with another power source (wall outlet or computer), allowing you to charge your battery while transferring whatever files you need. It’s as simple as that.

Something to consider though, is the fact that you have to plug it in with the right side up. There’s no other way around it because Micro USB connectors are not reversible like their younger sibling Type-C. You’ll just have to pay a little more attention when connecting your devices.

Different Types And Compatibility

When the USB Implementers Forum finally rolled out the Micro-USB spec back in 2007, they released two types: A and B. What was commonly used at home and in offices was Type A – which allowed users to connect their portable devices without a hitch. However, this feature didn’t come without its downfalls.

The real kicker for most people was that they couldn’t switch roles between being a host device and a peripheral device with Type A. Because of this oversight, vendors ended up adopting Micro-USB Type B as the standard for data transfer and charging across all portable tech.

Nowadays though, many of these same devices can achieve OTG capabilities by using an OTG adapter where necessary. So just keep that in mind next time you’re shopping.

Micro USB has lost out to USB Type C as the world’s most popular charging and data transfer connector, but it isn’t dead yet. For low-cost vendors who don’t need advanced features, the good old Micro USB might be the right choice.

According to a new report from research firm Omdia (via Android Authority), 6.1 billion charging ports in consumer electronic devices were expected to use micro-USB connectors by the end of 2020. That represents 41% of all consumer electronic device charging ports shipped last year.

Omdia expects demand for micro-USB connectors to continue over the next few years and only start declining after 2023. By that point, Omdia believes nearly all smartphones will have moved on from using micro-USB connectors, which will cause demand to decline sharply.

The report explains that even when other electronics begin to abandon micro-USB connectors for modern alternatives like USB-C, demand is expected to remain strong for smartphone accessories like smartwatches and earbuds with charging cases.

Micro-USB was first introduced in 2007 and became widely used in smartphones thanks to its inclusion on early Android handsets. However, when Apple launched its iPhone 5 with a proprietary Lightning connector in 2012, it simultaneously forced manufacturers of Android phones and other electronics to find an alternative.

Audio and Video Output Devices: In some cases, Micro USB cables can be used with Mobile High-Definition Link (MHL) technology to output audio and video signals from an older mobile device to an older television or monitor. This allows you to view your device’s content on a larger screen. This setup demonstrates how specific output devices can be effectively utilized to enhance the viewing and listening experience from mobile devices.

The Pros and Cons of Micro USB

Like any technology, Micro USB has its pros and cons. While it’s been widely adopted across the industry, which has made it easy for consumers to find chargers that are compatible with their portable devices and brought down the cost of connection cables, improper insertion of the connector can damage the port over time.


  • Compatible with various portable computing devices 
  • Endurance: up to 10,000 connect/disconnect cycles per cable 
  • Supports USB OTG for host/peripheral role-switching 


  • Introduced in 2007 for USB 2.0 only (USB-C is superior)
  • Limited video output support 
  • Charging power is limited compared to USB-C 
  • Becoming less common

Apple, Lightning, and the Future of Micro USB

Apple has long been known for its proprietary connectors. But recently, pressure from the European Union for a universal charging standard prompted Apple to abandon its Lightning connector in favor of USB-C.

While Apple previously made available a Micro USB-to-Lightning adapter as a concession to the popularity of Micro USB, this latest move is further evidence that Apple is embracing USB-C technology. Though there may never be an official announcement that Apple will fully transition away from Lightning altogether.

However this issue shakes out in coming years, we should prepare ourselves for life without Micro USB.


What is a micro USB?

Simply put: A micro USB is a small connector used to charge mobile devices and transfer data between them.

Is a Micro USB Type-A port the same as USB Type-A?

No, a USB Type-A is the larger rectangular connector you’re probably more familiar with— like the one you might see on your computer or laptop. Micro USB Type A is a smaller connector designed specifically for mobile devices and USB On-The-Go (OTG) functionality.

Is Micro USB the same as USB-C?

No, they are different connectors. What makes USB-C superior to Micro USB is its faster data transfer speeds, higher power delivery capacity, and reversible design.

Is Micro USB still used?

Although it is being phased out by USB-C, Micro USB devices are still used in many budget-friendly electronics. Any device made before USB-C was popular only has a Micro USB port for charging and data transfer.

How are Type A and Type B different?

Type A allows devices to become a host or peripheral with the help of USB On-The-Go (OTG) technology. It has since been replaced by type B which became the standard for mobile charging and data transfer.

Can I charge a device through its USB-C port using a Micro USB cable?

Using an adapter to attach a Micro USB cable to your device’s USB-C port can work, but it will slow down its charging speed. This is because the newer format takes advantage of higher power delivery capabilities not found in older cables.

Will my Micro USB cable fit all devices?

Micro USB cables do work on other devices as long as they have the same ports. However, try not to use them with other cords like Lightning or Thunderbolt without an adapter.

Is it possible to transfer files from a micro USB device to a USB-C device?

Yes, you can transfer files from one of these two devices as long as you have either an adapter or a cord that connects both ends.

What should I do about damaged Micro USB ports?

Without experience, it’s best to leave port repairs up to professionals instead of fixing them yourself. However, keep in mind that replacing the whole device may be smarter if it’s old enough.

Will this format ever get replaced?

With time, more people will move on from Micro USB as more products take on the newer format—USB-C. But until then, make sure you keep adapters nearby just in case you need compatibility with older models.

Posted in :

Related terms

Related articles

About XPS's Editorial Process

XPS's editorial policy focuses on providing content that is meticulously researched, precise, and impartial. We adhere to rigorous sourcing guidelines, and every page is subject to an exhaustive review by our team of leading technology specialists and experienced editors. This method guarantees the integrity, pertinence, and utility of our content for our audience.

Ross Jukes
Ross Jukes
Ross Jukes is an accomplished American copywriter with a Bachelor’s Degree in English Literature and a minor in Creative Writing. Based in the United States, Ross is a language expert, fluent in English and specializes in creating compelling and engaging content. With years of experience in the industry, he has honed his skills in various forms of writing, including advertising, marketing, and web content. Ross's creativity and keen eye for detail have made him a valuable asset in the field of copywriting, where he continues to excel and innovate.

Why Trust Us

Our editorial policy emphasizes accuracy, relevance, and impartiality, with content crafted by experts and rigorously reviewed by seasoned editors for top-notch reporting and publishing standards.

Purchases via our affiliate links may earn us a commission at no extra cost to you, and by using this site, you agree to our terms and privacy policy.

Popular terms

What is HRIS?

HRIS, short for Human Resource Information System, is a software platform that allows employers to store and manage employee data in an easily accessible...

What is Market Capitalization?

Market capitalization or market cap is a financial measure that denotes the value of a digital currency. It has historically been used to measure...

What is a WebSocket

In the world of web development, communicating between clients and servers in real time has become a necessity. That's where WebSocket comes in, using...

What is AI Ethics?

AI ethics is a field that is concerned with the creation and employment of artificial intelligence (AI). It is a set of values meant...

What is Relative Strength Index (RSI)?

Relative Strength Index (RSI) is a powerful technical analysis tool which is used as a momentum oscillator for measuring how fast and how much...

Latest articles