Nokia has five Windows Phone 8 devices. The first wave was the release of the Lumia 620, 820 and 920. Nokia followed this up with the Nokia 520 and 720. Notably, one change Nokia made to its design was giving the new phones larger batteries relative to display size.
Using GSM Arenas's the battery life test we can compare how the new Lumia's fare. For comparison with other models, I will include the Samsung Galaxy S4 and Apple iPhone 5S on the list.
Talk Time
Nokia Lumia 720 - 15 hours and 17 minutes
Samsung Galaxy S 4 - 13 hours and 53 minutes
Nokia Lumia 620 - 14 hours and 17 minutes
Nokia Lumia 520 - 13 hours and 33 minutes
Nokia Lumia 920 - 8 hours and 56 minutes
Apple iPhone 5 - 8 hours and 42 minutes
Nokia Lumia 820 - 7 hours and 9 minutes
The Lumia 920 and 820 both use the Qualcomm MSM8960 which does not seem to be as efficient in talk time as the Qualcomm MSM8227 found on the Lumia 520, 620 and 720.
Web Browsing
Apple iPhone 5 - 9 hours and 56 minutes
Samsung Galaxy S4 - 8 hours and 42 minutes
Nokia Lumia 720 - 7 hours and 37 minutes
Nokia Lumia 520 - 7 hours and 15 minutes
Nokia Lumia 820 - 4 hours and 24 minutes
Nokia Lumia 620 - 3 hours and 50 minutes
Video Playback
Samsung Galaxy S 4 - 10 hours and 16 minutes
Apple iPhone 5 - 10 hours and 12 minutes
Nokia Lumia 720 - 6 hours and 43 minutes
Nokia Lumia 620 - 6 hours and 32 minutes
Nokia Lumia 820 - 6 hours and 25 minutes
Nokia Lumia 920 - 6 hours and 19 minutes
Nokia Lumia 520 - 5 hours and 50 minutes
Video playback seems to be more taxing on Windows Phone than Android and iOS.
Standby (with 1 hour of calls, video playback and web browsing per day)
Samsung Galaxy S 4 - 63 hours
Nokia Lumia 720 - 60 hours
Apple iPhone 5 - 51 hours
Nokia Lumia 520 - 49 hours
Nokia Lumia 920 - 44 hours
Nokia Lumia 620 - 36 hours
As you can see, by putting a larger battery, relative to screen size in the newer Nokia Lumia 520 and 720, the two newest offerings are very competitive with the best phones in the class. Overall, the Lumia 520 and 720 fare much better than the Lumia 620, 820 and 920.
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