Abstract: An electric lawn apparatus is provided including a frame having an upper body and two side plates extending downwardly from sides of the upper body defining a cavity therein, an operator seat mounted on the upper body, two drive motors secured to the side plates away from the cavity, and a battery compartment formed within the cavity. The battery compartment receives battery packs therein along a rear-front axis of the electric lawn apparatus in a side-by-side orientation, where each battery pack has a maximum rated voltage of approximately 40V to 80V. A ratio of the cumulative energy output of the battery packs to a lateral distance between the drive motors is greater than or equal to approximately 0.23 kW/cm.

Abstract: A system for facilitating power tool operation includes a camera, a computing device receiving information from the camera, a display for displaying information received from the computing device, and a reference marker having at least two markers viewable by the camera. The reference marker is disposed on a power tool or separate from the power tool. The computing device calculates a position of the reference marker from the information received from the camera. The display can display video information showing the power tool and graphical information showing a desired position for the power tool and/or a direction of movement for moving the power tool towards the desired position for the power tool.

Abstract: A battery pack is provided including a housing, rechargeable battery cells disposed in the housing, a terminal block for detachably coupling the battery pack to a power tool, and a wireless communication circuit configured to wirelessly receive a wireless signal from a computing device provided remotely from the housing. The battery pack is configured to enable or disable a supply of power via the terminal block to the power tool according to the wireless signal. A power tool may similarly be remotely enabled or disabled via the computing device.

Abstract: A battery pack includes a housing, rechargeable battery cells disposed in the housing, a terminal block for detachably coupling the battery pack to a power tool, a controller, and a wireless communication circuit electrically coupled to the controller and configured to wirelessly receive information from an external device. The controller is configured to control a performance attribute of the battery pack according to the received information.

Abstract: A computing device including a display, a wireless communication circuit, and a processor. The device is configured to: wirelessly contact a set of power tools; display a listing of the power tools; wirelessly receive a user selection of a first power tool from the listing; receive at least one performance data associated with a performance of the first power tool; display attributes including the performance data and identity data of the first power tool in response to the user selection; receive a user modification input modifying the at least one performance data; and transmit instructions to the first power tool to modify the performance data in accordance with the user modification input. The computing device may implement this process with a set of battery packs or non-rotary devices.

Abstract: A method of programming a power tool includes: establishing a wireless communication link between a power tool and an external computing device having a processor; receiving on the external computing device and from the power tool a first profile associated with a working parameter for controlling an operation of the power tool; displaying, on a display of the external computing device, a graphical representation of the working parameter; receiving a user input at the external computing device to change the working parameter from the first profile to a second profile; transmitting the second profile from the external computing device to the power tool; and programming the power tool to adjust the working parameter in accordance with the second profile.

Abstract: A battery pack charger system may include a first charger configured to charge a first battery pack, a second charger configured to charge a second battery pack, a support arranged between the first charger and the second charger, and a power cord configured to deliver power. The first charger may be attached on a first side of the support and the second charger may be attached on a second side of the support that is opposite the first side of the support. The first charger and the second charger may be arranged directly opposite of each other. The power cord may be connected to one of the first charger or the second charger.

Abstract: A battery pack charger system may include a first charger configured to charge a first battery pack, a second charger configured to charge a second battery pack, a support arranged between the first charger and the second charger, and a power cord configured to deliver power. The first charger may be attached on a first side of the support and the second charger may be attached on a second side of the support that is opposite the first side of the support. The first charger and the second charger may be arranged directly opposite of each other. The power cord may be connected to one of the first charger or the second charger.

Abstract: A battery pack charger system may include a first charger configured to charge a first battery pack, a second charger configured to charge a second battery pack, a support arranged between the first charger and the second charger, and a power cord configured to deliver power. The first charger may be attached on a first side of the support and the second charger may be attached on a second side of the support that is opposite the first side of the support. The first charger and the second charger may be arranged directly opposite of each other. The power cord may be connected to one of the first charger or the second charger.

Abstract: A battery pack charger system may include a first charger configured to charge a first battery pack, a second charger configured to charge a second battery pack, a support arranged between the first charger and the second charger, and a power cord configured to deliver power. The first charger may be attached on a first side of the support and the second charger may be attached on a second side of the support that is opposite the first side of the support. The first charger and the second charger may be arranged directly opposite of each other. The power cord may be connected to one of the first charger or the second charger.

Abstract: A power tool system includes a power tool, a power tool battery pack and a battery pack charger. The power tool battery pack is separable from and attachable to the power tool, and electrically connectable to the power tool electrical terminals when attached to the power tool. The power tool battery pack has at least one battery cell, a receiver coil, and a control circuit for controlling the amount of power that is provided to the at least one battery cell. The battery pack charger has at least one transmitter coil for generating a magnetic field which induces a voltage in the receiver coil, and a control circuit for controlling the amount of power that is provided to the transmitter coil.

Abstract: A power tool system includes a power tool, a power tool battery pack and a battery pack charger. The power tool battery pack is separable from and attachable to the power tool, and electrically connectable to the power tool electrical terminals when attached to the power tool. The power tool battery pack has at least one battery cell, a receiver coil, and a control circuit for controlling the amount of power that is provided to the at least one battery cell. The battery pack charger has at least, one transmitter coil for generating a magnetic field which induces a voltage in the receiver coil, and a control circuit for controlling the amount of power that is provided to the transmitter coil.

Abstract: A power tool system includes a power tool, a power tool battery pack and a battery pack charger. The power tool battery pack is separable from and attachable to the power tool, and electrically connectable to the power tool electrical terminals when attached to the power tool. The power tool battery pack has at least one battery cell, a receiver coil, and a control circuit for controlling the amount of power that is provided to the at least one battery cell. The battery pack charger has at least one transmitter coil for generating a magnetic field which induces a voltage in the receiver coil, and a control circuit for controlling the amount of power that is provided to the transmitter coil.

Abstract: A chop saw includes a base assembly and a saw assembly pivotally attached to the base assembly. The base assembly has a workpiece-supporting plane. The saw assembly has a blade and a motor driving the blade. A hinged connection between the base assembly and a saw assembly allows a user to rotate the saw assembly from a position where the plane of the blade extends through the workpiece-supporting plane to a position where the plane of the blade does not extend through the workpiece-supporting plane. In such position, the plane of blade may be substantially parallel to the workpiece-supporting plane.

Abstract: A power tool system includes a power tool, a power tool battery pack and a battery pack charger. The power tool battery pack is separable from and attachable to the power tool, and electrically connectable to the power tool electrical terminals when attached to the power tool. The power tool battery pack has at least one battery cell, a receiver coil, and a control circuit for controlling the amount of power that is provided to the at least one battery cell. The battery pack charger has at least one transmitter coil for generating a magnetic field which induces a voltage in the receiver coil, and a control circuit for controlling the amount of power that is provided to the transmitter coil.

Abstract: A sander is provided and includes a housing, a power supply, a motor, a switch, and a switch actuation mechanism. The housing extends from a proximal end to a distal end and includes a first convex upper surface having a surface area A1. The power supply is coupled to the distal end of the housing. The motor is disposed within the housing and is powered by the power supply to drive an output member. The switch is in electrical communication with the power supply and is operable to selectively power the motor. The switch actuation mechanism is pivotably coupled to the proximal end of the housing and operable to actuate the switch. The switch actuation mechanism includes a second convex upper surface having a surface area A2.

Abstract: A sander is provided and includes a housing, a power supply, a motor, a switch, and a switch actuation mechanism. The housing extends from a proximal end to a distal end and includes a first convex upper surface having a surface area A1. The power supply is coupled to the distal end of the housing. The motor is disposed within the housing and is powered by the power supply to drive an output member. The switch is in electrical communication with the power supply and is operable to selectively power the motor. The switch actuation mechanism is pivotably coupled to the proximal end of the housing and operable to actuate the switch. The switch actuation mechanism includes a second convex upper surface having a surface area A2.

Abstract: A power tool has a housing, a motor disposed in the housing, a tool holder driven by the motor, a control circuit for controlling the motor, a rotary input rotatable relative to the housing, and a rotational sensor for sensing the rotational position of the rotary input relative to the housing. The rotary input can be a thumbwheel or a handle that rotates relative to the housing. The control circuit receives input from the rotational sensor for controlling motor speed, rotational direction, etc. Other user interface mechanisms are disclosed as well.