(Reuters) - Amazon.com Inc is set to release a higher-end Kindle version with a rechargeable protective case for a better battery life, the Wall Street Journal reported on Tuesday, citing a person familiar with the matter.
The online retailer is also developing a solar-charged Kindle case, the Journal reported, citing another source.
Amazon could not be immediately reached for a comment.
The company's chief executive tweeted on Monday that the latest version of the reading device is ready and details could be expected next week.
(Reporting by Rishika Sadam in Bengaluru; Editing by Maju Samuel)