Technology has become part of almost every aspect of daily life, yet many of the beliefs people hold about their phones, laptops, and internet connections are based on advice that is years, or even decades, out of date.
Tips that once made sense for older devices are often repeated on social media without considering how modern technology has changed. Other myths have been fuelled by conspiracy theories or misunderstandings that refuse to disappear despite scientific evidence proving otherwise.
The result is that millions of people still worry about things that are either harmless or simply untrue. In some cases, following outdated advice can even make devices perform worse. From fears about 5G and charging phones overnight to misconceptions about Mac security and private browsing, experts have spent years correcting these claims.
Here are 15 of the most common technology myths that deserve to be left behind.
Overnight Charging Ruins Your Battery
Many people still unplug their phone before going to bed because they believe charging overnight destroys the battery.
That advice was more relevant when older battery technologies were common. Modern smartphones use lithium-ion batteries together with software that stops charging once the battery reaches full capacity. Apple, Google and Samsung all include battery management features designed to reduce wear during overnight charging.
Technology journalist Eric Griffith, citing battery experts, summed up the misconception by saying, 'You can't overcharge a smartphone battery.'
Modern devices automatically stop charging once the battery reaches full capacity, although excessive heat can still affect long-term battery health. Using cheap chargers or keeping a phone under a pillow while charging can generate unnecessary heat, but overnight charging itself is not harmful for most modern devices.
Closing Apps Saves Battery Life
It feels satisfying to swipe away dozens of apps, but doing so rarely helps battery life.
Apple's Senior Vice President of Software Engineering, Craig Federighi, famously answered a customer's question about whether users should routinely close apps with a simple response: 'No and No.'
Modern operating systems freeze inactive apps rather than letting them run continuously. Reopening an app from scratch often uses more power than returning to one already stored in memory. Experts recommend force closing an app only when it freezes or behaves unexpectedly.
5G Is Dangerous to Your Health
This remains one of the most persistent technology myths.
Health agencies around the world have repeatedly said there is no credible scientific evidence that properly regulated 5G networks harm human health. Like previous generations of mobile technology, 5G operates within internationally recognised safety limits.
The US Food and Drug Administration states, 'The weight of scientific evidence has not linked cell phone radio frequency radiation with any health problems.' The World Health Organization has also said that no adverse health effects have been established from exposure to wireless technologies operating within international safety guidelines.
Macs Cannot Get Viruses
Apple computers have long enjoyed a reputation for being immune to malware.
The truth is that Macs can and do become infected. Their Unix-based architecture and Apple's security features make attacks more difficult than on many other systems, but cyber criminals can target macOS because of its growing popularity.
Apple itself acknowledges this reality, noting that 'macOS includes built-in antivirus technology' as one of several layers designed to defend against malware. Security experts advise Mac owners to install software updates promptly, download applications only from trusted sources, and remain cautious about suspicious emails and websites.
More Megapixels Always Mean Better Photos
Camera marketing often focuses on megapixels, leading many buyers to assume higher numbers automatically produce better photographs.
In reality, image quality depends on many factors including sensor size, lens quality, image processing and lighting conditions. A well-designed 12-megapixel camera can outperform a poorly designed 108-megapixel camera in everyday use.
Professional photographers regularly point out that sensor quality, computational photography and good optics usually have a much greater effect on image quality than megapixel counts alone.
You Should Always Let Your Battery Reach Zero
This advice dates back to nickel-based rechargeable batteries.
Lithium-ion batteries work differently. Experts generally recommend keeping charge levels somewhere between 20 and 80 per cent when practical rather than regularly allowing complete discharge.
Occasionally running the battery lower will not cause lasting harm, but making it a habit may reduce battery longevity over time because lithium-ion batteries perform best when they avoid repeated full discharge cycles.
Incognito Mode Makes You Anonymous
Private browsing is useful, but many people misunderstand what it actually does.
Incognito mode prevents your browser from storing local history, cookies and search records after the session ends. It does not hide your activity from your internet provider, employer, school or the websites you visit.
Google explains that Incognito lets users 'browse more privately', but it does not make them invisible online. Cybersecurity specialists frequently remind users that private browsing offers local privacy rather than complete online anonymity.
More Signal Bars Mean Faster Internet
A phone displaying full signal bars does not automatically guarantee fast mobile internet.
Signal strength is only one part of the equation. Network congestion, available bandwidth, the technology being used and the number of nearby users all affect performance.
You can sometimes experience excellent download speeds with fewer bars than expected, while full reception during busy periods may still produce slow internet.
Public USB Charging Ports Always Infect Your Phone
Warnings about 'juice jacking' have circulated for years.
Cybersecurity agencies acknowledge that malicious charging stations are technically possible, but there are very few confirmed real-world cases involving ordinary consumers.
Security journalist Dan Goodin noted, 'There are no documented cases of juice jacking ever taking place in the wild.' Bob Lord, Senior Technical Advisor at the Cybersecurity and Infrastructure Security Agency (CISA), has similarly said, 'I have not seen any evidence that juice-jacking is even occurring.'
If travellers are concerned, experts recommend using their own charger plugged into a standard electrical socket or carrying a USB data blocker. Being cautious is sensible, but not every airport charging station should be treated as dangerous.
Antivirus Software Solves Every Security Problem
Installing antivirus software is only one part of staying secure.
Many successful cyber attacks rely on phishing emails, stolen passwords or fake websites rather than traditional computer viruses. Even the best antivirus software cannot protect users who willingly hand over sensitive information to criminals.
Security professionals consistently recommend strong passwords, two-factor authentication and regular software updates alongside antivirus protection.
A VPN Makes You Completely Anonymous
Virtual private networks have become increasingly popular, but they are often misunderstood.
A VPN encrypts internet traffic between your device and the VPN provider, helping protect privacy on public Wi-Fi and reducing tracking by local networks.
It does not make someone invisible online. Websites can still collect information, VPN providers may keep logs depending on their policies, and users can still reveal their identity by logging into personal accounts.
AI Always Gives Correct Answers
Artificial intelligence tools have become remarkably capable, but they remain imperfect.
Large language models sometimes generate inaccurate information, misinterpret questions or confidently present incorrect facts. Researchers refer to these mistakes as hallucinations.
The FBI cautions users against placing blind trust in AI-generated content, stating, 'A human being is ultimately accountable for the actions taken, not an AI.' Experts recommend treating AI as an assistant rather than an unquestionable authority, particularly when dealing with legal, financial or medical information.
Smart Speakers Are Always Listening
Devices such as Amazon Echo and Google Nest are designed to listen for wake words such as 'Alexa' or 'Hey Google'.
That does not mean they constantly record every conversation.
Most audio processing occurs locally until the wake word is detected, although accidental activations can happen. Privacy experts recommend reviewing device settings, deleting stored voice recordings where available and understanding what data is collected.
Software Updates Only Add New Features
Many people delay updates because they think they are unnecessary.
In reality, software updates frequently contain security patches that close newly discovered vulnerabilities. Delaying updates can leave phones and computers exposed to attacks that have already been fixed.
Apple advises that 'Software updates provide important security updates and are recommended for all users.' Cybersecurity experts consistently rank prompt software updates among the simplest and most effective ways to improve digital security.
Deleted Files Are Gone Forever
Deleting a file usually removes its reference rather than immediately erasing the underlying data.
Until that storage space is overwritten, specialist recovery software may still retrieve deleted information. That is why organisations securely erase storage devices before selling or disposing of them.
For sensitive information, experts recommend using secure erase tools or encrypting devices before disposal to reduce the chances of data being recovered.
Technology changes quickly, but old advice often survives much longer than it should. Many of these myths originated when devices worked very differently, while others have been kept alive through online misinformation.
Listening to current expert guidance rather than outdated internet tips can help people use their devices more effectively, protect their privacy and avoid unnecessary worry. As phones, computers and artificial intelligence continue to evolve, questioning long-held assumptions may be just as important as learning about the latest innovations.
Frequently Asked Questions
- Does overnight charging ruin your smartphone battery?No, modern smartphones use lithium-ion batteries and have software that stops charging once full.
- Do Macs get viruses?Yes, Macs can get viruses, though their architecture makes them less susceptible than other systems.
- Is 5G dangerous to your health?No, there is no credible scientific evidence that 5G networks harm human health.
- Does closing apps save battery life?No, modern operating systems freeze inactive apps, and reopening them uses more power.
- Does incognito mode make you anonymous online?No, it only prevents local storage of history and cookies; it does not hide activity from ISPs or websites.
