Power supply and dual-chargeable battery pack therein

A power supply, comprising a base and at least one dual-chargeable battery pack, the power supply being characterized in:

• the dual-chargeable battery pack comprising a main body, the main body having an electrical energy storage device, a first connecting device and a second connecting device;
• the first connecting device comprising a first charging terminal set and a first power output terminal set, the first charging terminal set being configured to receive an input of a first power for outputting to the electrical energy storage device;
• the second connecting device comprising a second charging terminal set configured to receive an input of a second power for outputting to the electrical energy storage device;
• the electrical energy storage device being configured to output the electrical energy accumulated therein as a third power by means of the first power output terminal set while the second power is different from the first power;
• and
• the base comprising a third connecting device and a fourth connecting device, the third connecting device being configured to connect with the first connecting device and to receive the third power output by the first power output terminal set, the base further comprising an output-voltage modulation device for modulating the third power into a fifth power having a variable electrical potential, and the fifth power being output through fourth connecting device.