In my Soundlink there is a different PCB, which is much smaller. And there is no plastic frame that holds the battery. The battery is connected with nickel tabs to the PCB and glued to it with double sided tape. And this sandwich construction is sealed with heat shrink and covered with foam tape to make it fit in the enclosure. Procedure remains roughly the same, but you have to cut through the heat shrink to be able to remove the battery.