Abstract: A charging and discharging system with anti-counterfeiting function of a battery pack for an electric tool includes: a battery pack which includes a data acquisition module and a battery pack verification module; and at least one charge-discharge adapter which includes an adapter verification module, an adapter controller, and a discharging communication verification module.

Abstract: A charging and discharging system with anti-counterfeiting function of a battery pack for an electric tool includes: a battery pack which includes a data acquisition module and a battery pack verification module; and at least one charge-discharge adapter which includes an adapter verification module, an adapter controller, and a discharging communication verification module.

Abstract: A universal power tool battery pack and recharging system that is selectively connectable to and supportable by a cordless power tool. A battery pack comprises rechargeable lithium-ion battery cells to recharge a power tool battery. A housing forms a protective shell for the battery pack. A connector interfaces with different types, sizes, and models of hand held power tools through the same battery platform. The connector alternatively receives the battery pack and different power tools having different cross-sectional areas through a charging and discharging interface. A connector cover protects the connector and a connector printed circuit board. The system has an automatic cooling system, including a fan, a battery printed circuit board, and vents, for dissipating heat from the battery pack. A dual sequential charger energizes the battery pack. A power display, including a lamp, indicate when the battery pack, or the power tool, or both are fully charged.