The review goes on to say that changes to the Kindle 2 have made it tougher to read the smaller font sizes that most books use.Some writers discuss how the font size is at times worse than that of the first generation Kindle. This device has a larger screen than the standard Kindle and supports PDF files.S.-only Kindle 2, although it uses a different mobile network standard.
On October 22, 2009, Amazon stopped selling the original Kindle 2 and sold the Kindle 2 international version worldwide.
Amazon originally used the codename Fiona for this e-reader.
Kindle hardware has evolved from the original Kindle introduced in 2007 and the Kindle DX (with its larger screen) introduced in 2009.
The range includes devices with a keyboard (Kindle Keyboard), devices with touch-sensitive, lighted high-resolution screens (Kindle Paperwhite), a tablet with the Kindle app (Kindle Fire), and low-priced devices with a touch-sensitive screen (Kindle 7).
Amazon has also introduced Kindle software for use on various devices and platforms, including Microsoft Windows, mac OS, Android, i OS, Black Berry OS and Windows Phone.
On November 24, 2009, Amazon released a firmware update for the Kindle 2 that increased battery life by 85% and introduced native PDF file support for the device.