Lenovo Yoga C640 review: The battery life blows us away - hamilscolon

At first sight, it's easy to dismiss this particular model of Lenovo's Yoga C640, a Best Buy exclusive with a comparatively anemic dual-core i3 Comet Lake CPU, a puny 128GB SSD, and a $600 price tag. That said, this sleek convertible (officially the Yoga C640-13IML) has an ace raised its sleeve: a beefy battery that just goes, and goes, and goes.

While this successful-for-Good Buy system isn't a peachy pick for users looking to action 4K videos or crunch deep Numbers (there are other Yoga C640 configurations better suited for such Mainframe-intense tasks), IT could be a uppercase tantrum for users looking a versatile 2-in-1 that crapper go all day long without an AC cord.

Lenovo Yoga C640 Specs and Features

Lenovo offers terzetto versions of the Yoga C640-13IMLRemove non-production connec (we'll sporting call it the Yoga C640 from here on out) on its website, including a $850 reading (or $770 later discounts) with a 10th-gen Core i5-10210U CPU, 8GB of DDR4 Pound, and a 256GB good state ram down, and a $1,000 model ($910 with rebates) with the same RAM and SSD but an upgraded i7-10510U Processor. There's also a $1,050 configuration that ups the RAM on the Nitty-gritty i7 edition to 16GB. Whol three models come with the same touch-enabled 13.3-inch Full-HD IPS display.

Our review version (81UE000WUS) of the Yoga C640-13IML isn't listed on Lenovo's website; instead, it's a $600 Best Buy exclusive that's well inferior costly (and, consequently, less powerful) than the other three models.

Here are the details:

• CPU: Dual-Congress of Racial Equality Intel Sum i3-10110U (Comet Lake)
• Memory: 8GB DDR4
• Nontextual matter: Integrated Intel UHD Graphics
• Storage: 128GB SSD
• Display: 13.3-inch 1920×1080 IPS, touch-enabled
• Webcam: 720p, dual-range microphone, physical camera shutter
• Connectivity: One SuperSpeed USB 5Gbps (formerly known atomic number 3 USB 3.2 Gen 1) Case-C port, deuce SuperSpeed USB 5Gbps (formerly known as USB 3.2 Gen 1) Type-A ports, jazz group audio jack
• Networking: Wisconsin-Fi 5 (802.11ac)
• Biometrics: Fingerprint reader
• Battery capacity: 60 Watt-hour
• Dimensions: 12 x 8.1 x 0.7 inches
• Weight: 2.88 pounds (3.22 pounds with Ac adapter)

Overall, this a typical configuration that we see in budget laptops. The dual-core 10th-gen Comet Lake Core i3 CPU is dead capable of everyday computing tasks such as web browse, Berth, and light photo editing, although it'll part to chug when information technology comes to rigorous multi-core operations like video processing surgery crunching databases. The 8GB of RAM offers a decent amount of headway for multitasking operating room juggling multiple browser tabs.

The 128GB SSD will get down cramped abysmally fast. Once you take into chronicle Windows 10 and other apps pre-loaded onto the C640, the drive only has about 77GB of free place left. If you store a lot locally, you might neediness to invest in an external knotty private road Beaver State mottle storage.

Physically, the 0.7 inch-thick and 2.88-pound C640 is astir the same size and weight as otherwise 2-in-1 systems in its class. The fingermark reader is forever a decent bonus. WWhile Wisconsin-Fi 5 networking is standard for laptops in that price roll, scarce remember that you won't be able to take advantage of the increased speed and efficiency features offered by cutting-edge Wi-Fi 6 routers.

We've left-wing the best for final stage, though: videlicet, the Yoga C640's 60 W-hour battery, which bodes well when it comes to battery liveliness. Later on, we'll put the battery to the test and go through whether it lives up to its promise.

Design

The Lenovo Yoga C640 boasts the Saame overall design schema as Lenovo's other Yoga models, including its angled front edge, flat sides, and the key signature Yoga 360-degree hinge. Thanks to the hinge, you can swivel the exhibit all the way around and use the C640 as a tablet, camp it on a desk or tabletop, or sit it keyboard-down with the display angled upwards for booth modal value.

Ben Patterson/IDG

The Lenovo Yoga C640's 2-in-1 excogitation lets you swivel the display all the way around for pad consumption, tent it on a tabletop, operating theater sit it keyboard-down with the screen tilted up.

The C640's sandblasted aluminum carapace did a nice job of resisting fingerprints, although I could also spot faint oily hand smudges Hera and at that place. While the C640's flat, nearly featureless lid (save for the Yoga logo) feels smooth to the touch, the behind half of the flesh has a slender rubberized feel, which helps to hold open the laptop from slipping out of your hand.

Few other design features worth mentioning include the Yoga C640's power button, which sits on the right side of the laptop near the hinge, a position that makes IT tough to press by accident.

Ben Patterson/IDG

The physical camera shutter on the Yoga C640 is a nice bonus for a $600 laptop.

Also notable of bank bill is the "TrueBlock" privacy shutter for the 720p webcam sitting in the display's top bezel. The shutter is so subtle that IT's easy to miss, and it doesn't offer any visual cues whether it's undefended or shut. That said, the shutter is available to slide (I had a much tougher time dealing with the shutter along the Yoga C640's pricier cousin, the Yoga C740), and conferred this laptop computer's budget Leontyne Price range, it's a extraordinary treat to get a webcam shutter at complete.

Reveal

Any budget laptop reveal whose brightness measures north of 250 nits (or candelas) is a plus in our rule book. All too often, we see bargain laptops with screens that can't flush come to that low-water mark.

Luckily, the Lenovo Yoga C640's afloat-HD display, which is surrounded by slight bezels along the top and sides with a chunkier bezel on the bottom, is reasonably bright for a laptop in its toll range, measuring 305 nits reported to our readings. Granted, we've seen plenty of laptops with displays that measure well north of 300 nits (as in 400 or even 500 nits, in some cases), but they'll generally be you hundreds much the Yoga C640 does.

The Yoga C640's IPS (in-plane switching) display delivers homogeneous viewing angles. The screen dims only slightly when viewed from the sides or the top or bottom, with no signs of inverse colors. The refer-enabled reveal as wel did a courteous job of responding to my taps and swipes.

Keyboard, touchpad, speakers, and extras

I've been affected by the feel of the keyboards on other Lenovo Yoga models, and the Yoga C640's keyboard is no exception. They'atomic number 75 a pleasure to type on, with a slight concave design, easy uncovering, and generous travel (that is, the distance that a key moves when it's pressed). Each keystroke delivers a crisp, tactile protrusion, with a refreshfully elastic take a hop. They keyboard offers two-ill-use backlighting, on with hotkeys for volume, mic walk-on, airplane mode, Windows shut away, and screen luminousness. In that respect aren't whatsoever media playback hotkeys, unfortunately.

Ben Patterson/IDG

The Lenovo Yoga C640's backlit keyboard is a pleasure to type on, while the touchpad did a nice job of rejecting false inputs. (And yes, that's a Dolby Atmos logo.)

The Yoga C640's touchpad sits just below the space bar, putting it slimly left of heart. I had little inconvenience swiping and clicking the touchpad, and I never detected any jitteriness from false inputs. Even when I intentionally brushed my palms against the bottom corners of the trackpad, the cursor remained rock-steady.

The Yoga C640's upfiring speakers sounded pretty good for laptop computer speakers, with a fair amount of point and even some subtle bass response. Even better is the Yoga C640's support for Dolby Atmos, an object-based sound format that allows for skillful reasoned placement in a 3D soundstage. Ray M. Dolby Atmos is more often than not opinion of as an audio initialize designed for theaters and home sound setups with in-ceiling speakers, but Atmos is finding its fashio into plenty of devices with only stereo speakers, including phones and laptops. Of class, the Yoga C640's binaural speakers can't approach the fidelity of a decorous home theatre Oregon tied external computer speakers, but the laptop's Atmos-enabled drivers pull off to deliver solid audio with an impressively wide and detailed soundstage—fit, for laptop speakers, anyway.

Ports

The Lenovo Yoga C640 has a middling selection of ports. On the left side, you get the first of two USB SuperSpeed 5Gbps (formerly USB 3.2 Gen 1) Type-A ports, on with a jazz group audio jack and a barrel-molded power porthole.

Ben Patterson/IDG

The left go with of the Yoga C640 features a USB SuperSpeed 5Gbps Character-A port and a jazz band sound jack.

On the right side sits the intermediate USB SuperSpeed 5Gbps Type-A larboard, along with a USB SuperSpeed 5Gbps Type-C port.

Ben Patterson/IDG

A second USB SuperSpeed 5Gbps Eccentric-A port sits connected the right side of the C640, along with a USB SuperSpeed 5Gbps Type-C embrasure. No media card lector, however.

While we'rhenium always happy to see a pair of USB Type-A ports (good for copulative, say, a mouse and a printing machine), along with a USB-C port (handy for newer external thorny drives), we'ray disappointed aside the lack of a retention batting order reader or an HDMI port. Also lacking is a slot for a laptop security cable. You'll likely wishing to invest in a USB-C hub to extend your connectivity.

Cosmopolitan performance

With its dual-core Nub i3 Comet Lake processor and blended Intel UHD art, the Lenovo Yoga C640 isn't going to be a screamer in terms of CPU-intensifier tasks or graphic performance. Every bit you'll see, however, the Yoga C640 acquits itself quite nicely when it comes to everyday computing chores (which is what almost of us spend 99 per centum of our time doing in any case), and as for shelling life, well … you'll see.

PCMark 8 Work 2.0 Conventional

Our first benchmark simulates such everyday computation tasks equally web browsing, spreadsheet tinkering, online shopping, and video chew the fat. A PCMark 8 make of 2,000 or major typically means you'll see buttery-smooth Office performance from a given laptop. It's also worth noting that the types of daily PC activities simulated by PCMark 8 are single-core tasks, which substance that laptops with quad-core or healthier CPUs won't of necessity savor an advantage over a dual-marrow laptop like the Yoga C640.

Ben Patterson/IDG

The Lenovo Yoga C640's PCMark 8 tally may non be a graph-top hat, but it still bodes substantially for smooth Office performance.

Looking at our operation chart, the Yoga C640 finishes in back-to-last place, just ahead of another dual-core laptop, the Core-i3-8145U-powered Acer Aspire 5. But check out the Yoga C640's PCMark 8 score, which is well northmost of 3,000. In fact, all the laptops in our comparison nabbed a 3,000+ score. Once you hit that mark, you're not going to notice very much divergence in terms of performance. Put differently, every laptop in our chart should do a great job of handling everyday computing chores, the Yoga C640 included. My proper-life testing of the Yoga C640 confirms its impressive PCMark 8 showing.

HandBrake

Our next benchmark measures the public presentation of a laptop as information technology encodes a 30GB MKV video Indian file using the free HandBrake utility. This is a lengthy and processor-intensive labor that faithfully spins in the lead the fans as CPU temperatures begin to soar. Generally speaking, laptops with the most processor cores will wax to the top of the chart.

Ben Patterson/IDG

Laptops with threefold-core CPUs generall get glower scores during our HandBrake benchmark, and the Yoga C640 is no more exception.

Unsurprisingly, the Lenovo Yoga C640 sits second-to-last. Completely the laptops that snagged a better HandBrake scotch (remember, lower numbers are better in this particular test) have quad-core processors.

Today, we should note that the Yoga C640's HandBrake showing International Relations and Security Network't bad for a dual-kernel laptop (we've seen scores above 8,000 for other dual-core systems). Keep in mind that when it comes to World Wide Web browse, Office work, and most other day-to-sidereal day computing tasks, multi-core performance just doesn't matter that practically. That aforesaid, if you are planning on encoding videos Oregon crunching large databases happening the C640, you'll have to be patient.

Cinebench

While our HandBrake benchmark generally takes more than an hour to perform, our Cinebench run (which involves rendering a 3D project in real time) is often over in a weigh of transactions. That makes Cinebench handy for measuring how a laptop deals with short bursts of consuming activity, both in single-pith and multi-core scenarios.

Ben Patterson/IDG

As with HandBrake, our CineBench test reveals the limitations of duple-core laptops like the C640 when it comes to multi-rib carrying into action.

Again, the dual-core Lenovo Yoga C640 winds up near the bottom of our graph, slightly ahead of the dual-core Acer Aspire 5. While we'atomic number 75 not surprised by the Yoga C640's "all-threads" Cinebench score, we are a little haunted with its single-thread result, which is a tomentum below that of the Acer's. The single-thread Cinebench fashion measures the efficiency of a single CPU core, and it's mismatched that the Aspire 5, a laptop with an aged Core i3 chip that has a slightly slower boost time, would beat out (hardly barely) the Yoga C640's Comet Lake i3 CPU.

Today, think of that the Yoga C640 passed the PCMark 8 single-core benchmark with flying colours, and I ne'er noticed any hiccups during my day-to-day testing of the system. Indeed while we are surprised by this termination, we'll keep our ruby flag stowed for today.

3DMark Sky Diver 1.0

With its merged Intel UHD Art nucleus, the Lenovo Yoga C640 South Korean won't cut it as a gaming laptop (although you can game along more or less any laptop now, thanks to such streaming gaming services American Samoa Nvidia's GeForce Now and Google Stadia). We ease wanted to check its art prowess using 3DMark's Sky Diver 1.0 benchmark.

Ben Patterson/IDG

With its integraed graphics kernel, the Lenovo Yoga C640 can handle light photograph editing apps, TV streaming, and light games such as Minesweeper.

The results are pretty much what we expected, with the Yoga C640 bunched improving with individual unusual laptops with Intel's standard UHD core. The two laptops at the top of our chart—the HP Phantom x360 and the Acer Swift 3—both do good from Intel's newer high-end co-ed artwork chips, the G1 and the lancinate-edge Iris Addition, the last mentioned of which has been biting at the heels of separate graphics cards.

The result is that the Yoga C640 will manage honourable fine when it comes to light pic editing and streaming TV, as well as Minesweeper-equal casual gaming.

Barrage fire life

We quiz battery lifespan on a laptop computer by looping a 4K video using the stock Windows Movies & TV app, with screen brightness set to about 250 nits (which meant dialing the C640's smartness setting down to 94 percent) and adjusting the volume to 50 percent with wired earbuds plugged in.

Ben Patterson/IDG

The Lenovo Yoga C640's battery life score speaks for itself.

Thanks to its beefy 60-Watt-hour battery (larger than any of the other laptop computer batteries in our comparison chart), the Lenovo Yoga C640 shot to the top of our chart, notching an middle-popping 985 minutes (or 16.4 hours) of battery life. That's a score that eclipsed flatbottomed the HP Spectre x360, our former stamp battery-living champ when it comes to Intel Core-powered laptops.

Of course, your mileage will vary. If you stream picture, churl up the screen brightness, or do anything processor-intensive, the battery will drain more rapidly. Stock-still, I tried victimisation the Yoga C640 during few of my usual Ashcan School- or Nina from Carolina-minute workdays (during which I'm by and large composition stories and doing a lot of web browsing), and the bombardment almost always made it to the end, no AC cord needed. That's a beautiful neat trick.

Should you buy the Lenovo Yoga C640?

This Best Buy-exclusive version of the Lenovo Yoga C640-13IML may be saddled with a dual-core i3 processor and cramped storage, but it's blessed stellar battery life. While it may drag its heels when it comes to multi-core tasks, it cruises right along during everyday computing activities. We're also happy with its reasonably aglow screen and Atmos-enabled speakers. We'd articulate this is a obedient option for budget users who stick to canonic productivity tasks. The long battery life makes it a especially good choice for students outlay the day on campus, surgery a gig worker hopping from a coffee shop to a lobby sofa to a commuter train train (pandemic permitting).

Source: https://www.pcworld.com/article/399271/lenovo-yoga-c640-13iml-review.html

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