Electric riding lawn mower

An electric riding lawn mower comprising:

• a seat;
• a main frame to support the seat;
• a power output assembly comprising a mowing element for outputting power to realize a mowing function and a first motor for driving the mowing element to output power;
• a walking assembly configured to at least drive the electric riding lawn mower to travel on a surface and comprising a second motor to drive the walking assembly;
• and
• a power supply device comprising at least four first battery compartments and at least four battery packs detachably coupleable to the at least four battery compartments;
• wherein the at least four first battery compartments are mounted to the main frame, the at least four first battery compartments are further provided with input terminals to bring in electrical energy to the electric riding lawn mower, and the at least four battery packs are configured to power a hand-held power tool, and the battery packs are also capable of powering the second motor of the riding lawn mower.

A power tool system, comprising:

• an electric riding machine;
• and
• a garden tool different from the electric riding machine,
• wherein the electric riding machine comprises:
• a seat for a user;
• a main frame to support the seat;
• a power output assembly comprising a mowing element for outputting power to realize a mowing function and a first motor for driving the mowing element to output power;
• a walking assembly configured to at least drive the electric riding machine to travel on a surface and comprising a second motor to drive the walking assembly;
• and
• a power supply device comprising a plurality of first battery packs,
• wherein the plurality of first battery packs of the power supply device form a detachable connection with the main frame, the plurality of first battery packs are detachably connectable with the main frame and configured to couple to and power the garden tool, and the plurality of first battery packs are detachably connectable to the garden tool and configured to couple to and power the second motor of the electric riding machine.