POWER SUPPLY INTERFACE FOR ELECTRIC TOOL POWERED BY PLURALITY OF BATTERY PACKS, AND ADAPTER Russian patent published in 2014 - IPC H02J7/00 

FIELD: electricity.

SUBSTANCE: electric tool containing tool case, electric load placed inside the above tool case; power supply interface for the above electric tool containing interface of the first battery pack adapted for removable fastening of the first battery pack and including an input terminal of the first battery positive terminal and an input terminal of the first battery negative terminal; interface of the second battery pack adapted for removable fastening of the second battery pack and including an input terminal of the second battery positive terminal and an input terminal of the second battery negative terminal. The input terminal of the first battery negative terminal is connected electrically to the input terminal of the second battery positive terminal, at that the input terminal of the first battery positive terminal is connected electrically the input terminal of the second battery negative terminal through the above electrical load. The indicators (160; 260) adapted for data display in regard to the respective states of the first battery packs are placed so that they are seen simultaneously by the electric tool user.

EFFECT: increased operational reliability of the battery pack.

20 cl, 22 dwg