Battery and battery pack

摘要

A battery and a battery pack comprising a rechargeable battery (2) and a circuit substrate (3) integrated therein by a resin mold package (11) are provided. Resin is filled between the rechargeable battery (2) and the substrate (3) electrically connected thereto, so as to unite them as one battery of battery pack. The rechargeable battery (2) includes an engaging member (26) which functions as an anchor to the resin mold package (11) formed onto the battery, whereby the resin mold package (11) is firmly joined to the rechargeable battery (2). A thermo-sensitive element can be incorporated either on the circuit substrate (3) or within the space filled with resin.