High-end smartphones have uniformly crappy battery life. I don't care if you pack an iPhone 3GS, Nexus One, or N900...your mobile doesn't last as long as you'd like it too. That's why we have portable batteries, like this new line from Unioo. (via iTech News)
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The i800 and i1500 are for the iPhone and iPod. The i800 has an 800 mAH battery that gives you about 3 hours of talk time, while the i1500 has a 1500 mAH battery that's good for around 5. The best of the three (and the only one that works on every smartphone) is the i5400. This device works with anything that connects via a USB charge cable. It has a massive, 5400 mAH battery.