Battery Life and Charging

First things first, the Lumia 900 has none of the charging issues or problem behavior that initially plagued the Lumia 800. In the course of our battery life testing, I’ve repeatedly discharged and charged the phone completely and the Lumia 900 charges up from completely empty like a champ. It seems those initial growing pains are now squarely behind Nokia.

In addition, Nokia has gone with a compact 5W charger (5V 1A) that the Lumia 900 takes full advantage of during a charge cycle - I repeatedly saw the Lumia 900 draw over 800 mA during the charge cycle in its diagnostics menu, which is awesome. One of the things I’ve seen requested a lot is also measurement of just how long devices take to charge from completely empty - I measured the Lumia at almost exactly 3 hours with repeatability, using the supplied charger. The Lumia 900 uses an internal 1830 mAh, 6.77 Whr battery which is about what you’d expect for a device which includes a 4.3" SAMOLED display and LTE.

So how does battery life fare on the Lumia 900? To find out, I turned to our regular suite of battery life tests which consist of pages loaded endlessly until the phone dies, with the display set as close to 200 nits as possible. In the case of the Lumia 900, this actually ends up being the max brightness setting (WP7 offers three settings and auto). Due to time constraints, I haven’t run the WiFi page loading test, but have run the cellular tests over both 3G WCDMA and 4G LTE.

Cellular Talk Time

Web Browsing (Cellular 3G - EVDO or WCDMA)

Web Browsing (Cellular 4G WiMAX or LTE)

When it comes to web browsing, both the 3G WCDMA and 4G LTE results end up being pretty close at around 4.4 hours. This tells me that we’re pretty much dominated by the display’s power drain in that neighborhood. The web browsing tests tend to be pretty brutal on AMOLED devices to begin with, partly because we’re dealing with black text atop a white background. In practice I feel like the Lumia 900 does subjectively a lot better than these results really would lend you to believe. If you can believe it, we actually haven't formally published any AT&T LTE device results yet, so the Lumia 900 is our first.

In addition I’ve also run our hotspot tethering test on 3G WCDMA and 4G LTE, which consists of four tabs of our normal webpage loading suite alongside a 128 kbps MP3 internet radio stream all loaded on one wireless client.

WiFi Hotspot Battery Life (3G)

WiFi Hotspot Battery Life (4G)

The results of the tethering test demonstrate just how taxing constant connectivity can be for the current crop of 45nm basebands, and the Lumia 900 does pay the price for having a relatively hungry one. Our testing was done in good AT&T LTE and HSPA+ coverage, and interestingly enough the results are pretty close for the two air interfaces at around 3 hours. Jumping onto LTE and running the same test incurs a half hour hit.

WP7.5 and Preloaded Applications Performance Analysis


View All Comments

  • sonicmerlin - Saturday, April 07, 2012 - link

    Also even on the S4 Android isn't smooth. Look at how much of a delay occurs between when you swipe your finger and the screen finally responds with movement. There's really just no comparison to a proper OS that prioritizes the UI thread. Reply
  • crispbp04 - Wednesday, April 04, 2012 - link

    I have the HTC titan and I use it all day every day. It's always fast, always smooth, always fun to use, and if I forget to plug it in at night I can still use it the entire next day. Android made me want to punch myself in the face after it turned to junk after 2 weeks. I was flashing a new rom on it every other day and spending hours customizing it.... now I get to spend that time actually ENJOYING my phone.

    I have never once said "I wish my phone was faster". I've never felt like my phone needed a dual core because WP7 has an awesome staff of engineers making sure the user experience is the #1 focus.

    I am getting the Lumia 900 because it has LTE and is one sexy ass phone. I'm waiting for the white one to launch though because it is absolutely gorgeous. I am going to whore out my Titan to my friends who have been dying to try out the WP ever since I got it.
  • Beerfloat - Wednesday, April 04, 2012 - link

    The experiences you claim seem highly exaggerated at best. Is this a genuine post or more astroturf?
  • crispbp04 - Tuesday, April 10, 2012 - link

    I can demo my phone to you if it'll make you feel better. Want me to make a youtube video for you? I have the following devices:

    1) HTC HD2 running windows phone mango
    2) Samsung focus
    3) HTC Titan
    4) Blackberry Bold (work phone)

    I went to the AT&T store and did NOT purchase the lumia only because the Ttitan II was so much better than I expected. Now I am waiting until the white lumia comes out to see if it sways me back to the lumia, otherwise I'm getting the Titan II
  • bplewis24 - Tuesday, April 03, 2012 - link

    @ vision

    You either don't know what you're doing or have no idea what you're talking about. You should probably stop posting FUD and flat out lies.
  • Iketh - Tuesday, April 03, 2012 - link

    I have both an Android (wife uses it) and WP device, and Android absolutely sucks. It's getting replaced as soon as AT&T allows it.

    Vision is 100% accurate.
  • jmcb - Tuesday, April 10, 2012 - link

    The problem with vision's post is he said every Android phone he's used. Well...... every Android phone he's used does not equal all Android phones.

    I can tell you that Android doesnt absolutely suck...thats just your opinion. WP7 might be smoother, has less lag than most Android phones....but that doesnt make up the entire user experience.

    Kids mother has a Nexus S and an iPhone 4. She likes her iPhone 4 more cuz she says the Nexus S sticks, gets stuck too much. I assume she means lag. After using both....I would go with the Nexus S. Based on my wants n needs.

    One thing we gotta remember is everybody doesnt have the same wants n needs. If that was the case...we would all have iPhones now. I'm talking about before Android even came out.... we would all have iPhones.
  • sprockkets - Wednesday, April 04, 2012 - link

    "Well, in general if Android doesn't suck so much none of us really need a quad-core phone. Clearly WP is much more efficient platform than Android today so a single-core phone can be this solid and for most people this translates to feeling faster than most Android phones that lags when apps are running and sans performance."

    It's called the GUI is GPU accelerated. Already solved in ICS. It was sorely needed, yes. But I'm willing to bet people will still harp about this even with the HTC One series and new Samsungs come out.

    "Nearly every Android device I've used today needs manual management in order to run smoothly. Letting a single widget or app sitting background too long, battery life and performance suffers. Android's entire ecosystem is to blame for faulty app coding to OS builds rigged with bloatware."

    Sorry to hear that one widget is killing your phone. I have 3 of them and I'm on to day 3 of my battery life with 3G and Wifi on with sync.

    "Bloatware" is also no longer an issue either with ICS.

    Hey, whatever floats your boat, go with it. I personally cannot tolerate the GUI on WP7 past 2 minutes.
  • eddman - Wednesday, April 04, 2012 - link

    "It's called the GUI is GPU accelerated. Already solved in ICS."

    Actually it was/is not just that. It's an underlying OS issue.

    For a fair comparison, flash ICS on a 1 GHz single-core (preferably snapdragon) android phone with 512 MB memory and then compare to a 1 GHz WP.
  • Exodite - Wednesday, April 04, 2012 - link

    You don't need ICS for Android to compare well in such a situation, you just need a device that has had at least moderate optimizations towards the actual hardware.

    Ie. probably not a LG device, or one mangled too much by the carrier.

Log in

Don't have an account? Sign up now