To change the battery voltage of the SW6208, you can use a different battery or adjust the connection of the battery.
First, make sure to use batteries that meet the SW6208 specifications to prevent damage to the device.
Second, the voltage output can be changed by connecting resistors between the positive and negative electrodes of the battery or adjusting the size of the resistors.
In addition, the use of variable resistors or adjustable regulators is also a way to change the battery voltage. However, no matter what method you use, be careful to avoid damaging the device or causing security risks. It is recommended to operate according to the specific specifications and requirements of SW6208, or seek professional help.