Smartphones with long battery life (roundup)

Smartphones are the Swiss Army Knives of the tech world.
They're cell phones, music and video players, mobile Web browsers, and personal organizers, among other things. Not surprisingly, all this can take a toll on battery life, and when you depend on your smartphone for so much, the last thing you want is for it to run out of juice when you need it most.
Generally speaking, with moderate use, smartphones can give you a full day's performance before needing to be recharged, but not all gadgets are created equal--some simply run out of steam early, whereas others will hang in there for the long haul. Here are five smartphones with battery usage that really impressed us, whether it was because they scored well in our CNET Labs battery tests, or simply because their usage time stood out from the crowd of humdrum cell phone batteries we encountered (and believe us, we encounter a lot). Give one of these devices a try if you're looking for a phone that packs some decent juice.

Sony Ericsson Xperia Arc S
With its beautiful slim design and multiple color versions, the Sony Ericsson Xperia Arc S also impressed us with its long-lasting battery. Read the full review.

Motorola Droid Razr
The Motorola Razr reincarnated itself as a smartphone this time, with tons of top-notch features and decent battery life to boot. Read the full review.

Nokia Lumia 710
Don't let the plastic construction fool you. The Nokia Lumia 710 packs a pretty good punch when it comes to battery life. Read the full review.

HTC Rhyme
Perhaps purple isn't your favorite color, but if you like compact smartphones with good battery life and extra accessories, then the HTC Rhyme is worth a look. Read the full review.

Samsung Galaxy S II
When it came to testing the Galaxy S II, let's just say a certain editor was stuck at the office late waiting for the smartphone's battery to die. Read the full review.
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