The manufacturer or a service centre can change the battery if this is/will be necessary. The battery usually has a shortened warranty, especially with regard to the battery life. You cannot demand a replacement if the battery no longer lasts all day after 6 months, as it did when the device was new. Otherwise, everyone would have it replaced every 6 months. As a rule, you have to pay for a battery replacement. This information applies generally. It is best to contact the manufacturer directly for further details and how this is handled at LG.