The Fujitsu STYLISTIC® Q550 Slate PC is an emerging slate PCs running Windows 7 that offers "quick-swap" batteries. Unlike the Apple iPad (which does not have a user-removable battery), the Q550 makes it easy to swap between the 2-cell or 4-cell battery. Here's a little video that will give you a sense of what the Q550 will have to offer:
The STYLISTIC Q550 Slate PC equips you with the tools you need to efficiently complete mission-critical tasks. Its combination of pen and multi-touch will raise your computing interaction to new levels of convenience and productivity.