So if you are working in darkness, the display screen dims, and in vivid sunlight the display screen becomes much brighter (and makes use of extra battery energy, too). In simpler terms, meaning if you are browsing the net, you can simply turn the Thrive 90 degrees and it will automatically alter the display screen for portrait (vertical) or widescreen (horizontal) viewing. Unlike the iPad, you can take away or exchange the system's battery at will. Biello, David. "New Energy-Dense Battery Could Enable Long-Distance Electric Cars." Scientific American. You can charge the battery with the included laptop computer-sized AC adapter or by investing in the usual $35 dock, which also permits you to use a Bluetooth keyboard. They do not wish to neglect clients who're unable or unwilling to use the net to make appointments. You should purchase an non-compulsory dock that lets you use a Bluetooth keyboard for quicker typing on the Thrive. Those embody the standard Android model and Swype, an app that permits you to "draw" phrases by working your finger from letter to letter as the program predicts the word you want.