[Shane R]

Amazon tells me it expects some owners to always detach the Oasis completely and use it bare; that way, it's the most lightweight. Others, though, will leave the charging cover in place; even then, it's slimmer than the Kindle Voyage with its origami case attached.

With the battery in the Oasis alone, Amazon says you should be able to read for two weeks - that's assuming 30 minutes per day, mind, and with the wireless turned off. With the charging cover lending its power, meanwhile, you should get nine weeks in all under the same conditions.

Sensibly, when the Kindle has the charging cover attached and is plugged in, it'll prioritize getting the Oasis recharged. A full charge of both should take around two hours.

http://www.slashgear.com/amazons-new...sive-13435618/