Sony reveals the Xperia Z5 Premium’s secret: It only shows 4K when you actually need it

sony xperia z5 premium part time 4k screen news
Sony’s new Xperia Z5 Premium is gorgeous, and the 4K (well, UHD) resolution screen a technically amazing achievement. However, many question how Sony will get the device to reach the quoted two-day battery life with such a high pixel count. Now we know why. The Xperia Z5 Premium only fires up all 3840 x 2160 pixels when you’re watching 4K video, or viewing images. The rest of the time, the screen’s showing at 1080p.

In a statement provided to PhoneArena, Sony says: “The Xperia Z5 Premium features a 4K display with a resolution of 3840×2160 pixels based on SID Standard and enables all video and image content to be enjoyed in 4K resolution. All other content is displayed at 1080p or lower resolution in order to optimize the performance and battery stamina for this device, ensuring you can enjoy the 4K resolution when you need it most.”

The Z5 Premium has a big 3430mAh battery inside, and in our hands-on test of the phone, we noted a two-day battery life seemed plausible after checking the battery usage meter on the device. While some may feel cheated that not all 3840 x 2160 pixels will be lit up at all times, it’s a very clever way of delivering high-res performance when we actually need it, without sacrificing a sensible standby time. The automotive industry has been doing something similar for years, creating big engines that run on fewer cylinders to conserve fuel, and only unleashing all of them when you step on the gas.

Sony announced the Z5 Premium alongside the Xperia Z5 and Z5 Compact, both of which have a fixed resolution screen — 1080p and 720p respectively. The phones are expected to go on sale near the beginning of November in the UK, but we’re still waiting to hear if any of the three phones will come to a U.S. network.

Product Review

Amazon’s child-friendly tablet is the complete package

Kids are tough on electronics and it’s difficult to police screen time and manage what they’re doing. The Amazon Fire HD 8 Kids Edition could be the affordable answer to your prayers, with a rugged case and worry-free warranty.
Home Theater

How to crack the code and find the best TV resolution for your needs

720p? 1080p? 4K UHD? What does it all mean? Choosing the best resolution for your TV can be tough, but fear not: We’ll break down the dirty details and help you figure out the right resolution for you.
Home Theater

Google Chromecast and Chromecast Ultra: Everything you need to know

Google's Chromecast plugs into your TV's HDMI port, allowing you to stream content from your tablet, laptop, or smartphone directly to your TV. Here's what you need to know about all iterations, including the 4K-ready Chromecast Ultra.
Deals

Time for a new TV? Grab the 55-inch Samsung curved 4K smart TV for $598

Shopping for a new TV and want to upgrade to 4K? Consider going curved: Samsung makes some of the best UHD TVs on the market today, including its unique curved lineup. Now, you can score the 55-inch Samsung curved 4K smart TV for just $598…
Home Theater

From game consoles to 4K UHD spinners, these are the best Blu-ray players

Streaming may be popular, but the disc isn't dead yet! To get the very best picture and sound quality from your system, you need to be watching Blu-ray or 4K Ultra HD Blu-ray discs. Here are the best Blu-ray players you can buy right now.
Mobile

Huawei Mate 20 Pro vs. P20 Pro: Which 2018 Huawei flagship is best for you?

If you're tempted by Huawei's latest flagship, the Mate 20 Pro, but you're uncertain how it differs from the P20 Pro which Huawei released earlier this year, then we have you covered. Find out exactly what sets these two phones apart.
Product Review

Simple, smart, and affordable, Google’s USB-C earbuds are a must-buy

Google’s follow-up to its wireless Pixel Buds are the wired Google Pixel USB-C earbuds. It’s the simpler route, but the earbuds are still smart, deliver good sound, and -- best of all -- they’re affordable.
Mobile

If you're light on memory, these are the best lite apps for Android and iOS

Looking to save data, storage, and reduce performance issues? Lite apps and Progressive Web Apps (PWAs) are the best options. Here's our roundup of lite apps and PWAs for all the most popular apps on the market.
Mobile

Master your new LG phone with these V40 ThinQ tips and tricks

With five cameras and awesome specs, the LG V40 ThinQ is one of the most innovative phones of 2018. While the V40 can get a great shot in any scenario, it's capable of so much more. Here are a few of our favorite tips and tricks.
Gaming

The Xbox app lets you access your console while away from home. Here's how

Microsoft's Xbox app can't do it all, but it does allow you to access your profile information and launch media content directly from your mobile device. Check out our quick guide on how to connect your smartphone to an Xbox One.
Mobile

Find out how to keep tabs on your phone with these helpful tracking tips

Need to keep tabs on the location of your cell phone or smartphone? Consult this guide for tips and tricks on how to track a phone, whether you're currently rocking Android, iOS, or something more old-school.
Product Review

It's got game. But the Razer Phone 2 is still crippled by its camera

The Razer Phone 2 will impress with its gaming prowess and 120Hz screen. But if you care at all about taking pictures on your phone, skip it. While Razer has improved the camera, it’s still short of the competition.
Mobile

Google’s new floating keyboard is so helpful, it’ll put you on cloud nine

Bezel-less smartphones look great, but typing isn't always so good, as grip can be more of a challenge. That's where Google's Gboard keyboard comes into play. It now has a floating keyboard feature to help out.
Mobile

Insane 5G Xiaomi Mi Mix 3 boasts a retro slide-up camera

Xiaomi will announce the Mi Mix 3 smartphone on October 25, and according to the company's spokesperson, it will be capable of connecting at 5G speeds and feature 10GB of RAM -- two world firsts.