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Proprietary Ethernet port requires (provided) adapter
In Lenovo's world, 'ThinkPad' means a business laptop, 'X1' means a premium ultraportable and 'Yoga' means a 360-degree rotating touch screen to enable laptop and tablet modes, and points in between. Lenovo is now on the fourth iteration of its ThinkPad X1 Yoga 2-in-1 convertible.
The ThinkPad X1 Yoga 4th Gen shares many characteristics with its laptop ThinkPad X1 Carbon 7th Gen stablemate, and the 2019 update sees it keeping up with top-end specifications. It's an expensive choice, starting at £1,449.99 and rising to £2,179.99 (inc. VAT) for a model with a 4K screen and integrated mobile broadband, as reviewed here. In the US, prices start at $1,595, rising to $2,729 for a model with a 10th-generation Intel Core i7 processor.
The industrial design is as you'd expect from a ThinkPad X1 device: a slim but robust aluminium chassis to protect the innards, and a lid I couldn't bow in my hands, make for a laptop that should travel well without a protective sleeve.
Weighing in at 1.35kg this is a lightweight laptop considering its 14-inch screen -- HP's 13.3-inch EliteBook 830 G6 weighs 1.3kg, for example. It's also relatively compact for a 14-inch laptop, measuring 323mm wide by 218mm deep by 15.5mm thick. (The ThinkPad X1 Carbon 7th Gen measures 323mm x 217 mm x 14.95mm and weighs 1.09kg, while the ThinkPad X1 Yoga 3rd Gen is slightly larger and heavier than this year's model at 333mm x 229mm x 17.05mm and 1.4kg.)
Much of the difference in desktop footprint between the 3rd and 4th Gen ThinkPad X1 Yogas is the result of thinner screen bezels on the 2019 model. Whether this creates problems for working in tablet mode will be down to how you hold the device, but with the top bezel also relatively shallow some users might have issues.
There is a webcam in the upper bezel, complete with a ThinkShutter sliding lens cover. If you want an IR camera for Windows Hello facial recognition you'll need the top-end model.
The keyboard is distinctively Lenovo with its pot-bellied keys, red TrackPoint sitting between the G, H and B keys and a corresponding set of buttons above the trackpad. This arrangement does mean the trackpad is a little shallower than some, but ThinkPad fans clearly don't mind this as it's a perennial and iconic feature.
Intel Core i7-8565U, Windows 10 Pro, 14-inch 3840 x 2160 touch screen, Intel UHD Graphics 620, 16GB RAM, 512GB SSD, integrated mobile broadband £2,179.99 (inc. VAT)
My review unit was the £2,179.99 (inc. VAT) model with an Intel Core i7-8565U processor, 16GB of RAM, a 512GB SSD, a 4K (3,840 x 2,160) touch screen and integrated mobile broadband. The high-resolution screen is likely a key reason for its somewhat disappointing battery performance.
Lenovo says the battery should last up to 18 hours. This might be achievable with the FHD (1,920 x 1,080) version of this laptop, but I think it's a stretch for the 4K model I reviewed. In my real-world test, which included writing into a web app, streaming music some of the time, and browsing regularly, the battery went from 100% to 35% in 6 hours. Screen brightness was automatically set to just above 50% by the system, and that was plenty bright enough. It could go lower to conserve battery life, but even then it wouldn't get near the suggested 18 hours.
The good news is that the ThinkPad X1 Yoga 4th Gen supports rapid charge. Lenovo says this will give 80% power in 60 minutes. I tested this by putting the laptop on charge with the battery at 33%. After an hour it had reached 94% -- a 61% power boost rather than the claimed 80%.
Although it's hard on the battery, the 4K screen is stunning. It's reflective, but all those pixels deliver wonderfully well-defined visuals. I found no evidence of the eye care mode that's present on the ThinkPad X1 Carbon (7th Gen), which reduces blue light, but PrivacyGuard is a configuration option on the FHD (1,920 x 1,080) screen. This is a screen security feature that makes it difficult for people sitting next to you to see what you're doing. Another security feature, PrivacyAlert, uses the camera to warn you of anyone standing behind you and peering over your shoulder.
Lenovo provides its ThinkPad Pen Pro stylus, which sits in a housing on the chassis that also charges the pen. It's thinner than some styli, but thanks to the on-device housing is less likely to be left behind, get lost, or have no charge when needed.
The Dolby Atmos speaker system has four speakers in total. There is a grille between the two hinges on the upper part of the keyboard behind which sit two up-firing speakers. Two further grilles on the underside cater for a pair of down-firing woofers. At 100% volume sound is somewhat distorted, but 60% is loud enough, and at that volume level there's no distortion and good overall sound quality.
The arrangement of ports is the same as on the ThinkPad X1 Carbon (7th Gen): full-size USB 3.1, a power button and the ThinkPad Pen Pro housing on the right; USB-C Thunderbolt 3/charge connector, USB-C Thunderbolt 3/Ethernet combo (which doubles as the dock connector; RJ-45 Ethernet adapter provided), USB 3.1 port, full-size HDMI and 3.5mm audio jack on the left.
There's also a SIM slot on the back of the chassis for use in models with mobile broadband.
It might seem strange that Lenovo still produces the conventional ThinkPad X1 Carbon as well as the 360-degree convertible ThinkPad X1 Yoga. After all, the convertible variant offers an extra feature that may be useful at times, even to the most conservative users. Still, both variants remain in the lineup for now.
The ThinkPad X1 Yoga 4th Gen is solidly built with the usual Lenovo look and feel. The combination of high-resolution 4K screen and 4-speaker system on my review unit are ideal for work presentations and after-hours relaxation, the stylus with an on-device housing is a bonus, and there are plenty of security features too. But, as with the X1 Carbon, beware of the 4K screen as it's a battery drainer.