High Quality Content by WIKIPEDIA articles! Bile bear, or battery bear, refers to Asiatic black bears kept in captivity in China and Vietnam to harvest bile, a digestive juice produced by the liver and stored in the gall bladder. When extracted, the bears’ bile is a valuable commodity for sale as an ingredient in traditional Chinese medicine (TCM). The bears are also known as moon bears because of the cream-colored crescent moon shape on their chest. The Asiatic black bear, the one most commonly used on bear farms, is listed as vulnerable on the World Conservation Union`s (IUCN`s) Red List of Threatened Animals.