But if you're after a smartphone for a specific purpose, such as for business, watching videos, gaming or travel, I've got a few recommendations.
For the traveler
Road warriors understand the value of a gadget that can stay charged for hours. Click here for simple tricks to improve battery life for iOS 7 and Android.
The current king of battery life is the Droid Maxx. It gets you up to 48 hours of use, so you don't have to worry about hunting for an outlet every few hours. It also has built-in wireless charging, so you can charge, grab and go.
Runner-up: The Samsung Galaxy Note 3 offers above-average battery life at 12-16 hours of use. It's heftier than the average smartphone, but this "phablet" cancels out the need to carry along a tablet on your next trip.