Don't be deceived by its remarkable slimness - Sony's newest tablet has power and battery life in abundance. A lack of enterprise focus holds it back, but the Xperia Z4 Tablet still looks, feels and runs like one of the best full-size slates money can buy.
Fast, incredibly portable for a full-sized tablet, great battery life, colourful display
Fiddly keyboard attachment, very few ports
From £499; £579 as tested
Processor: Qualcomm Snapdragon 810 2GHz, octa-core, 64-bit
Display: 10.1in, 2560x1600 resolution, TFT capacitive touchscreen
Storage: 32GB, expandable via microSD
Connectivity: WiFi, Bluetooth 4.0, optional 4G/LTE
Operating system: Android Lollipop 5.0.2
Battery: Lithium-ion (non-removable), up to 17 hours battery life
The 8.1MP rear-facing camera is one of the better tablet snap-takers out there, even if that's not saying much. Pictures appear sharp, especially if taken in good light, and colour reproduction is decent.
Taken on the Xperia Z4 Tablet
Unsurprisingly, the 2MP front-facing camera turns out much fuzzier, noisier and de-saturated shots, although video call quality is smoother than most tablets/convertibles we've tested recently. We're pinning this on the fact that the front camera, like the rear, has the rare quality of being able to record 1080p video.
Battery and storage
Sony claims that the Xperia Z4 Tablet's integrated battery will manage 17 hours of video playback before running out of juice. We tested this by playing a looped video file from full charge to empty, and found that it lasted an average of 10 hours and 18 minutes.
That's still a very good battery life and enough to endure a day's intensive work with charge to spare. Those who will pick up a tablet only for occasional or very light use can expect the Xperia Z4 Tablet to make it through a couple of days without needing to top up.
The only caveat is a lengthy charging time of about five hours to fully replenish the battery.
We wish the storage capacity was as good as the battery's, but the 32GB Flash drive offers only 22GB of space after counting all the firmware and pre-installed apps. It's a good thing that it can be expanded with microSD, as we can see 22GB filling up rather quickly.
There's a nagging sense that the Xperia Z4 Tablet, with its sparse ports and entertainment-focused bloatware, doesn't quite achieve its potential as an enterprise product.
That's a shame, because the bundled keyboard (while flawed) and free Office software are bold moves in a clearly professional direction.
Nonetheless, as a tablet per se, it's hard to resist. The lightness and wafer-thin design make it a joy to use on the move, and it can hold its own in terms of performance against devices that are twice the price while outlasting them with a top-notch battery.
It might not be the next big laptop replacement, but the Xperia Z4 Tablet is a great little slate regardless.