The Microsoft Lumia 640 Review
by Brandon Chester on June 9, 2015 8:00 AM EST- Posted in
- Smartphones
- Microsoft
- Mobile
- Lumia
- windows phone 8
Battery Life
One thing I distinctly remember about the Samsung Focus is much of an improvement the battery life was compared to the original Galaxy S. Windows Phone 7 was a very well tuned OS, and it managed battery life very well. When the first waves of Windows Phone 8 devices were launched, I heard complaints about battery life, and I was very surprised. The Lumia 930 review here at AnandTech confirmed that there were issues with battery life on at least some Windows Phone 8. However, the Lumia 735 achieved a very respectable battery life in our web browsing test. With both of those results in mind, I was very curious about how the Lumia 640 would fare when it comes to battery life.
As always, our first test is the WiFi web browsing battery life test. Since this Lumia 640 is locked to Cricket Wireless, I'm unable to also test it on LTE, which is unfortunate. However, Qualcomm's radios have evolved to the point where there's only a very small difference the between power usage with a good LTE signal and WiFi.
With a 9.5Wh battery and Snapdragon 400, I had expected the Lumia 640 to last much longer in this test. It shares many components with the Lumia 735, including the SoC, yet the Lumia 735 lasts significantly longer. I can only attribute this to display power usage, and even that seems strange as the Lumia 735 uses an OLED panel which will consume a lot of power when displaying the large white areas of web pages. To ensure there wasn't any sort of issue, I re-ran the battery test and achieved roughly the same result. 8 hours is not the lowest result we've seen, but it's ultimately disappointing when you consider how long other budget devices like the Moto E can last.
In GFXBench's battery test we see that the Lumia 640 sits between the Lumia 735 and the Moto E. However, it should be noted that although these three devices achieve a much longer battery life than other devices, this is a result of their relatively low performance during GFXBench T-Rex HD.
One observation that doesn't show up during out battery tests is idle battery life. During my time with the Lumia 640, I noticed that Windows Phone seems to have an abnormally high battery drain when devices are idle. Even though I was only able to use it on WiFi and had no cellular connection when I wasn't at home, I still found myself having to charge it in the early evening. The Lumia 640's battery life is certainly better than devices like the ZenFone 2 and Lumia 930, but it definitely doesn't compare to the Moto E and the Moto G.
Charge Time
The Lumia 640 ships with a 5V, 0.75A charger. This is a lower wattage than the 5W chargers that ship with most phones, and it's significantly lower than the high power chargers that are now reaching as high as 18W. Something worth noting is that at least with the North American Cricket Wireless version I received, the cord on the charging block is permanently connected, so you can't separate the block and the cable like on most devices.
With its relatively slow charger, the Lumia 640 has a fairly long charge time. It's actually the fastest of our group of low end devices though, with the Moto E being noticeably longer, and the Lumia 735 being substantially longer at 5.57 hours. Not including a super fast charger is obviously done for cost reasons, but I do wish these devices would ship with at least a 5W charger. Thankfully, if you do have 5W charger it will charge the Lumia 640 faster than the one included in the box.
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BabelHuber - Friday, June 12, 2015 - link
It depends on the software you use - nobody forces you to use the software the phone shipped with. For teh SGS4, I prefer AOSP-based ROMs or GPE-versions.Margalus - Thursday, June 11, 2015 - link
oh, and I am not ms propaganda. The phone wasn't bloated. Brand new out of the store with no apps it wouldn't last more than a day. The person at the store even told me that I would have to charge it every day. I also bought a replacement battery to use since it died so fast, that replacement battery works exactly the same as the stock battery. Barely 24 hours.BabelHuber - Friday, June 12, 2015 - link
You claimed your WP-phone lasts 5-8 times longer than your Android phone, didn't you? Perhaps this was slightly exagerated?But be it as it may, when I have battery problems I actually tend to install a tool to analyze things. Then I can deinstall or freeze the app which causes the problem or block its wakelocks. Problem solved.
Some other people may prefer to whine because of their low battery runtime instead, to each its own.
leexgx - Friday, June 12, 2015 - link
most avg for battery life is a Nearly a working day for most smartphones (8-12 hours)(if you turn off mobile data 3 days is easy maybe even 5 if you can get your phone to use 2G only) and Most people do not AOSP ROM there phone
we - Thursday, June 11, 2015 - link
Two things I cannot confirm (using a fully updated HTC 8X). 1. Action center always flows smoothly. Never had any stuttering or freezing. 2. Generally Scrolling speed is proportional to swipe speed. I can scroll from top to bottom of the "Windows Phone" page of this review within 5 seconds if I swipe quickly, or 15 seconds if I swipe slowly. Top scrolling speed could be faster though.Zizy - Thursday, June 11, 2015 - link
Currently using lowly HTC 8s which was the worst WP8 phone till 435, no issues with action center - no delay or freeze. It has somewhat strange/unexpected opening, because it can be fully opened or just enough to play with those 4 buttons and or go in settings. I never had enough unattended notifications to be able to test scrolling there.Camera - This isn't a proper camera with viewfinder or at least tiltable display. Ever tried underexposing something under bright sun? You wouldn't be able to see anything on the screen. But it would be good to have some notification to tell how many stops below the preview the image is going to end. If you are serious enough about manual stuff this should be enough to know how will the image turn out :)
As for idle battery drain - try activating battery saver and see the power draw then, plus check which apps drain the battery. If it is the same, probably screen, something failed to close / is intentionally running in the background or some other hardware/software bug. Shouldn't happen but does. Manually closing apps usually resolves the problem.
If battery saver does help, play with sync settings for mail and similar. For me, syncing mails as they arrive instead of manually every now and then drops battery life from 3-4 days to 1-2 (light use - no demanding games). If you get tons of mail it will be even worse.
Harry_Wild - Monday, June 15, 2015 - link
I just purchased an international version of the 735 and I love it for $300. It is unlocked. I purchased a cyan battery cover too. It feels like a iPhone 6 with a case on it! Same thinnest! The 400 is slow in some operations; but overall it pretty good overall. I switch to the iPhone 6 and back from day to day since they use the same nano SIMs card inside. My iPhone cost $900 so performance is quite a bit faster on everything. But still I like the change of environments. The WP does not have all the apps that I use so most case I pin the webpage and create an icon tile as a substitute. It works for a lot of Apple apps except for Apple Pay and Starbuck's Pay.SirPerro - Monday, June 15, 2015 - link
I'm just amazed at how people can deny the reality in front of them.This phone has a better camera/screen than a Moto E and it is MUCH worse in every other regard. The app selection and quality of the apps is orders of magnitude worse. The web browsing experience is laughable. The overal OS experience and fluidity is worse, no matter how much iOS/WP fanboys keep repeting stupidities about android performance.
The only reason Windows Phone is alive is because Microsoft has a HUGE pile of cash they can burn if they want to stay in the game, and I seriously pity everybody who puts they hard earned money in such a shitty and undeveloped ecosystem.
Even with the screen and camera, I find no single person in the planet to which I'd reccomend this phone over a Moto E. And while I'm probably much less polite, the bottom line of the review is Brandon & Anandtech agree with that.
Zizy - Tuesday, June 16, 2015 - link
Quick check whether you need Android/iOS ecosystem:Need an app not on WP? Don't get WP.
Really want anything social (games or apps)? Don't get WP.
Completely tied to Google/Apple? Don't get WP. Note that plenty think they are tied to google but only really need their search, mail and youtube and could easily ditch the rest.
Not found yourself up there? You will bitch about WP... but you will bitch about Android and iOS as well :)
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Want better hardware? Go with Lumia. Software? Moto E.
Would I buy Lumia 640 though? Heck no. I have a WP dev phone already, don't need another. As a primary phone, this one still has too poor camera for my wishes. Lumia 830 is much more tempting, but costs quite a bit more.
BaronMatrix - Monday, June 15, 2015 - link
MS is so pissing me off... First they destroy how I use my desktop, now since they bought Nokia NOT ONE NEW PHONE HAS COME OUT...You can't get the 640 anywhere... T-Mobile has it coming soon for MONTHS... And no 640XL even mentioned... Even the MS Store doesn't mention the 640...
I'm through with Windows Phone... I'll keep one for DEV, but I'm getting an Android phone... I'd rather be able to get all the cool apps that don't come on Windows Phone...