ENERGY SUPPLY APPARATUS AND ELECTRIC TOOL SYSTEM

Provided is an energy supply device for supplying power to a power tool. The energy supply device includes a housing detachably connected to the power tool in a mating manner and supported by the power tool; multiple cells supported by the housing of the energy supply device; a charging terminal assembly configured to be electrically connected to a charging apparatus to charge the energy supply device; and a discharge terminal assembly configured to be electrically connected to the power tool to provide electrical energy for the power tool. A charge rate of the energy supply device is greater than or equal to 6C.