iOS and Android OS upgrades can drain your battery life
Which? finds smartphones lose up to three hours' charge after OS upgrades

Updating iPhones and Android devices to the latest versions of their operating systems can cause battery life to fall by as much as three hours, according to consumer product researcherWhich?.
After updating a two-year-old iPhone 6 from iOS 8 to iOS 10, the battery drained 38 minutes faster than before,Which?said, putting overall battery life at 664 minutes. A Google Nexus 6 lost around three hours of continuous web browsing after updating from Android 6.0 Marshmallow to 7.0 Nougat.
It'ss not just battery life, as some software updates can take up considerably more hard drive space on some devices, the review found. Users with a MicrosoftSurface Pro 3 tabletwill lose almost 30GB of storage space if upgrading to Windows 10, enough for an entire photo album, according toWhich?.
Similarly, storage capacity on the Galaxy Tab S2 dropped from 24.03GB to 20.98GB after updating from Android 5.0 to Android 6.0 Marshmallow.
Infographic courtesy of Which?
"Our latest research shows that, while upgrades are meant to boost the performance of our phones and tablets, the opposite can actually prove to be true," said Richard Headland, magazine editor atWhich?.
"Given how much we rely on mobile devices, companies should do more to tell us about the possible downsides of updates, as well as the benefits."
Get the ITPro daily newsletter
Sign up today and you will receive a free copy of our Future Focus 2025 report - the leading guidance on AI, cybersecurity and other IT challenges as per 700+ senior executives
Although updates are recommended by companies to improve security or stability,Which?claimed that providers should be more transparent when it comes to effects on device performance.
"They should also explore ways of allowing their customers to revert to the previous software if they don't like the new version, and are willing to forgo any new security features it may offer," saidWhich?in a statement.
IT Prohas approached Samsung, Apple for comment, but has yet to receive a reply.
In September the consumer watchdog published new research after receiving "hundreds" of complaints about Microsoft'sWindows 10update. Of 2,500 users surveyed, 12% ended up reverting back to previous versions, in some cases losing emails and files or complete hardware failure.
Dale Walker is a contributor specializing in cybersecurity, data protection, and IT regulations. He was the former managing editor at ITPro, as well as its sibling sites CloudPro and ChannelPro. He spent a number of years reporting for ITPro from numerous domestic and international events, including IBM, Red Hat, Google, and has been a regular reporter for Microsoft's various yearly showcases, including Ignite.
-
Bigger salaries, more burnout: Is the CISO role in crisis?
In-depth CISOs are more stressed than ever before – but why is this and what can be done?
By Kate O'Flaherty Published
-
Cheap cyber crime kits can be bought on the dark web for less than $25
News Research from NordVPN shows phishing kits are now widely available on the dark web and via messaging apps like Telegram, and are often selling for less than $25.
By Emma Woollacott Published
-
Microsoft refuses to back down on Windows 11 hardware requirements
News The tech giant says it'll keep hardware specifications for Windows 11
By Nicole Kobie Published
-
Why the world is about to be swamped with AI PCs
News With adoption rates set to surge, AI PCs will become far more mainstream in years to come
By Nicole Kobie Published
-
Enterprise sustainability efforts mean pre-used hardware could be the key to reducing e-waste
News While IT leaders want to see more second-hand device options, manufacturer practices could prevent widespread adoption over the next decade
By Ross Kelly Published
-
Windows admins complain of Dell “bloatware” filling 95% of hard drives
News Dell SupportAssist Remediation was blamed for disk allocation issues
By Rory Bathgate Published
-
Best business laptops: Top business notebooks from Apple, Asus, Dell, and more
Best Looking for the best business laptops? Here’s our pick of the best machines around
By Alun Taylor Last updated
-
Best business tablets
Best We take a look at some of the best business tablets around, from Microsoft's Surface Go to the iPad Pro
By Clare Hopping Last updated
-
How to move Windows 10 from HDD to SSD
Tutorials Moving Windows 10 from an HDD to an SSD is one of the best ways to revive a sluggish system. Here are six simple steps to follow
By Clare Hopping Last updated
-
Best Windows Phone apps for 2018
Best We list the important Windows Phone apps to help you choose what to download
By Rene Millman Published