As with most of these teardowns, looking at the Droid 2's insides doesn't reveal much more than the basic technical specs, but they're always good for a few nuggets of information. Here are the highlights of what iFixit found in its Droid 2 teardown:
Same Battery, More Juice
Like the original Droid, the Droid 2 uses a 1400 mAh lithium ion battery, but Motorola advertises 575 minutes of call time in the Droid 2, compared to 385 minutes in the first model. Obviously, Motorola made adjustments elsewhere in the phone to sip less power. The battery is removable, as it was in the first Droid.
New Keyboard May be Interchangeable
The Droid 2's keyboard is one of its biggest new features, with raised keys and a wider stance in lieu of the previous generation's directional pad. If you've upgraded, but actually like the old keyboard, you might be able to switch them, but iFixit hasn't tested that yet. For original Droid owners, the hunt is on for Droid 2 parts suppliers.
Where's the Death Grip?
The Droid 2's antenna is a gold strip appended to the speaker housing, which itself is placed at the bottom of the phone's top panel, under the screen. Given that you usually hold a phone by its back and sides, I'm guessing (unscientifically) that signal interference won't be a problem when holding the phone normally.
More of the Same
I don't know how the original Droid performed on speakerphone and external audio (at least one review gave high marks), but iFixit says the Droid 2's speaker is the same.
Speakers are unsung heroes in smartphones, so hopefully Motorola's sticking with a good thing. The Droid 2's screen is also the same as the original -- 3.7 inches, full WVGA with 854×480 resolution -- and although the camera looks similar, it records video at 30 frames per second, compared to the original's 24.