A battery unit comprising a battery (2), and a battery encapsulation (3), comprising first and second encapsulation parts (4, 5) joined by a weld along a weld zone (14), the battery (2) being located in the encapsulation (3). The battery (2) comprises a recess (11) extending along the weld zone (14),...http://www.google.com.au/patents/US20050019653?utm_source=gb-gplus-sharePatent US20050019653 - Battery and a battery encapsulation
