A battery charger (10) for charging a rechargeable battery (45, 46) which is located in a hearing aid (18, 20), the battery charger (10) includes a power supply for supplying a charging current to the rechargeable battery (45, 46), a hearing aid connector for reception and accommodation of the hearing aid (18, 20), the connector having a set of first electrical terminals (36, 38) connected with the power supply and positioned for connection with the rechargeable battery (45, 46) when the hearing aid (18, 20) is positioned in the connector, and an actuator (32, 34) that is adapted for providing access to the battery (45, 46) for connection with the first electrical terminals (36, 38) when the hearing aid (18, 20) is positioned in the connector.