We showed you images of that extremely thick battery attached to the back of what we believed to be Motorola’s Droid Bionic. Now, new leaked images (via Engadget) show a mystery device known only as the “Droid HD”… which is seemingly a thinner, but beefed up version of the Bionic. However, we can’t help but feel the Droid HD looks like a polished, finished version of the Bionic (possibly as a pro model). There is a possibility it’s just a revised design and renaming of the Bionic, considering we find it hard to believe the device will be released publicly with that unnecessarily chunky design.

From the images, the apparently detachable battery appears to cover more surface area but is, luckily, much thinner than those leaked Bionic shots (the image above shows the Droid HD next to what we believe is the Droid Bionic). Some of the notable features discovered from the images include an 8mp rear-facing 1080p camera, front-facing camera, microUSB, HDMI, SIM & microSD on the left, and volume rocker on the right. Of course most are expecting the 4.5-inch display to sport HD resolution given the device’s “HD” moniker.

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We’ll keep you updated as more becomes available.

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