Unsurprisingly, given the lack of physical changes from the BlackBerry Bold 9700, it will probably come as no surprise at all that an identical 1500mAh battery lives inside the Bold 9780.
That's actually on the large side for most modern smartphones, and it shows in the battery life. With very light use, you could easily get four days from a single charge.
But what sort of madman only uses their BlackBerry lightly!? Well, the good news is that the battery should still last you comfortably for a day of serious playing. You'll probably need to charge it pretty much every night (particularly if you're taking advantage of the Wi-Fi and new media-rich browser combination), but you won't have to worry about it letting you down in the middle of the afternoon.
3G and Wi-Fi handle data duties on the BlackBerry Bold 9780, and the ability to quickly access the settings for them from the Home screen is great if you're wary of battery life.
The Bluetooth 2.1 capabilities of the Bold 9780 can also be accessed through this same menu, and A2DP audio streaming and mono/stereo headsets are all supported.
As we said before, our Bold 9780 on T-Mobile didn't exactly blow us away with its mobile data prowess, but when we had found a good, strong 3G signal, speed was perfectly acceptable. In the event that 3G isn't available, Edge is also supported, of course.
The GPS was highly accurate and reasonably fast in Google Maps.
Connecting to PC through the micro-USB will take you into the realm of the BlackBerry Desktop Manager, which enables you to back up your device, as well as syncing options for Tasks, Notes, Contacts and Calendar.
You can bring music across too, and it ties into your iTunes playlists, enabling you to selectively import songs.
Alternatively, you can just sync all of your songs, but many people might struggle to fit them all on the 2GB microSD card included. (Oddly, our test sample only came with a 1GB card, but RIM insists that the retail version includes a 2GB card.)
You can swap out that microSD for a larger one, of course, and then just go nuts with your music.