Battery charger for portable devices and related methods

A charger, which comprises the charger connector of portable device is a corresponding device connector connected, the portable device is a rechargeable battery. The charger can be further comprises a charger connected with the charging circuit, and a charger connector and charging circuit connected with the controller. The controller which is used for is connected to the charger opening portable device for wherein a sample device and a rechargeable battery type of multiple different device and battery different types, and is used in the charging circuit is placed on the charging to the rechargeable battery based on said.