Abstract: A rechargeable battery includes power storage modules, a charging module and a control module. The charging module is electrically connected to the power storage modules. The control module is electrically connected to the power storage modules. The charging module is configured to selectively charge the power storage modules through a plurality of charging paths. Each power storage module corresponds to one of the charging paths. The control module is configured to command the charging module to charge at least one of the power storage modules according to the SoC of each power storage module.

Abstract: A scan method for keyboards is firstly to set a higher voltage or a lower voltage to a keyboard scan input/output port when a low voltage signal is generated at a keyboard scan input port, and then to detect a voltage at the keyboard scan input/output port or the keyboard scan input port so as to determine whether the detected low voltage signal is a valid button-depressed signal or a noise. Further, a grounding resistor is connected electrically to the keyboard scan input/output port, and the scan method prevails as well to determine whether or not a detected low voltage signal is a valid button-depressed signal.

Abstract: A keystroke determination method and a device thereof are applicable to a keyboard input device. The keystroke determination device performs the keystroke determination method including the following steps. A triggering signal corresponding to both a first circuit node and a second circuit node of the keyboard input device is received. Whether a first key definition of the first circuit node represents a null key is determined. When the first key definition of the first circuit node represents the null key, a signal specifying a second key definition of the second circuit node is outputted.

Abstract: A keystroke determination method and a device thereof are applicable to a keyboard input device. The keystroke determination device performs the keystroke determination method including the following steps. A triggering signal corresponding to both a first circuit node and a second circuit node of the keyboard input device is received. Whether a first key definition of the first circuit node represents a null key is determined. When the first key definition of the first circuit node represents the null key, a signal specifying a second key definition of the second circuit node is outputted.