Motorola touts a nine-hour talk-time battery life for the Atrix, but we're not quite ready to sign on to that claim. What we do know is that the phone lasted all day on one charge, and does not have that annoying 'three hours and done' spec of some high-powered Android phones, such as the HTC Evo and the Samsung Epic.
One of the issues with rating battery life, though, is that it really depends on how you use the phone. Over several days, we tested a power user scenario, watching frequent video snippets on YouTube and running music on the phone, placing a few calls (some over a Bluetooth connection to a car), and playing games. On that day, the phone lasted more like six hours of total usage time.
On the second day, we used the phone only occasionally for music and placing calls, but not videos. The Atrix lasted about eight hours in that scenario. Presumably, if all you do is check contacts, visit a website, and place a few calls, the phone might last 9-10 hours on a charge.
We did like the fact that, upon getting home for the day, we just had to pop the phone into its dock to start charging again.
Motorola told us the battery life is better in part because of the dual-core processor, which tends to manage memory and apps better by sharing duties.
Smartphone makers are mum about how this actually works – they are not about to reveal any secrets about how their hardware works with the Android OS. In our tests, the Atrix was a long-lasting phone that's easier to charge with the docking station.