BATTERY CHARGE AND DISCHARGE PROTECTION DEVICE AND METHOD

A battery charge and discharge protection method is to be implemented by a battery charge and discharge protection device (200), and controls power transfer to a load device (901) based on results of detections of whether each of two batteries (903) is correctly installed or reversely installed and whether each of the batteries (903) is rechargeable or non-rechargeable. When any one of the batteries (903) is reversely installed, power transfer from the batteries (903) to the load device (901) is disabled. When both of the batteries (903) are correctly installed, the batteries (903) are connected in parallel if they are both rechargeable and in series if they are both non-rechargeable, and power transfer from the batteries (903) to the load device (901) is enabled.