The Kindle 3G
The Kindle 3G is quite thin and lightweight, it measures 7.5 x 4.8 x 0.335 inches (190 x 122 x 8.5 mm) and weighs 8.7 ounces (250 g). Its controls are well located, the design is very good and the device seemed to be very sturdy. As shown in Figure 4, the unit has rounded corners and sides, and the buttons for turning pages are located on both sides of the screen. Below the screen we see the keyboard, a 5-way controller and the Menu, Home and Back buttons. Figure 5 shows the back of the device, with the speakers on the upper part.
The keyboard has well rounded keys. The numbers are accessed through the Symbol key. The AA key gives access to text display options.
The Home key shows the contents stored on the Kindle and the content archived at Amazon. The Menu button displays the application’s options, as well as the navigation, related to the screen being displayed. The Back key works just like in a web browser: it is possible, for example, to follow a link on a book and then return to where you were.
The 5-way controller has several functions: by pressing the center of the controller an action or item is selected. The highlighted text or on-screen cursor is moved up and down by pressing the corresponding arrow on the controller. The highlighted text or on-screen cursor is moved side-to-side by pressing the arrow to the left or right. Pressing and holding down an arrow accelerate the cursor movement.
The buttons to turn the pages are very well located on both sides of the Kindle. Each side has two buttons, one for previous page (<) at the top, and one for next page (>) at the bottom. It is worth mentioning that the buttons are at surface level, without bumps or hollows.
The volume controls, headphone jack (headphones not included), microphone (not currently enabled but is provided for future use), micro-USB/power port, power switch and charge indicator light are located at the bottom of the device, as seen in Figure 8.
When we slide the power switch or charge the device, a green light goes on if the battery still has some energy. When the battery is low and needs recharging, an amber light goes on.
To put Kindle to sleep, just slide and release the power switch and a full screen image will appear on the display. While Kindle is asleep, keys and buttons are locked. Kindle will go to sleep by itself after ten minutes without use.
To turn Kindle off, it is necessary to slide and hold the power switch for seven seconds until the screen goes blank. To wake up or turn on Kindle, slide and release the power switch again. In case a password has been set, it will be prompted after turning on Kindle or waking it from sleep.
Kindle 3G can be recharged via the USB port of a computer or directly into the outlet. Battery life is excellent: up to one month with wi-fi disabled and up to ten days with wifi enabled. It is good to remember that the battery life will depend on how many books are indexed, how many pages are turned, and for how long the wireless has been enabled. Without loading Kindle with new books and leaving the wi-fi off, the device will only spend energy while turning pages.