It wasn't too long ago that we didn't need to worry about our cellphones dying at inopportune moments. In fact, the batteries could last us for days without needing a charge.
But now that our smartphones are, well, smarter, and we use them for dozens of functions, their batteries drain a lot faster.
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Companies like Tylt and Jackery have acknowledged this problem and have come up with a wide array of products to charge our phones on the go. We've compiled a list of great external battery packs for your smartphone or tablet to help you stay powered during a long commute, a tiring conference or even in emergencies when the power goes out.
Is your phone's battery life a frequent concern for you? Let us know in the comments.