Abstract: A work light including a body defining a first end, a second end opposite the first end, a length extending between the first end and the second end, and a pivot axis extending parallel to the length. The first end includes a power button. The work light further includes a light source head pivotally coupled to the body to pivot about the pivot axis and configured to be operated by the power button. The light source head includes a planar light panel having a plurality of light emitting diodes aligned in a direction parallel to the pivot axis. The work light further includes a battery receptacle disposed on the body and configured to receive at least a portion of a battery. The battery couples to the battery receptacle by sliding into the battery receptacle along the direction parallel to the pivot axis.

Abstract: A portable power source. The portable power source includes a housing, a first battery pack support configured to receive a first removable and rechargeable battery pack, a second battery pack support configured to receive a second removable and rechargeable battery pack, an inverter within the housing, and an alternating current power outlet. The inverter is configured to receive output power from the first removable and rechargeable battery pack and the second removable and rechargeable battery pack. The inverter is configured to produce an alternating current power output. The alternating current power outlet is configured to receive the alternating current power output from the inverter. The inverter is configured to be disabled when the first removable and rechargeable battery pack is received in the first battery pack support and the second removable and rechargeable battery pack is not received in the second battery pack support.

Abstract: A work light including a body having a mount surface, a pair of ferromagnetic members coupled to the body and disposed adjacent the mount surface, and a recess defined in the mount surface in the space between the pair of ferromagnetic members. The pair of ferromagnetic members define a space therebetween. The recess is a keyhole slot configured to receive a nail from which the work light can be hung. The work light further includes a light source pivotably coupled to the body opposite the mount surface, such that the light source pivots relative to the body about a vertical axis when the work light is hung using the recess.

Abstract: An electrical combination including a power tool and a battery pack. The power tool includes power tool terminals. The battery pack is configured to be interfaced with the power tool. The battery pack includes a battery pack housing, at least three terminals, and a plurality of battery cells. The battery pack terminals include a positive terminal, a negative terminal, and a sense terminal. The at least three terminals are configured to be interfaced with the power tool terminals. The plurality of battery cells are arranged within and supported by the battery pack housing. Each of the battery cells has a lithium-based chemistry and a respective state of charge, and power is transferable between the battery cells and the power tool. A circuit is configured to monitor the battery cells, detect a charge imbalance among the battery cells, and prevent the battery pack from operating when the charge imbalance is detected.

Abstract: A portable power source. The portable power source includes a housing, a first battery pack support configured to receive a first removable and rechargeable battery pack, a second battery pack support configured to receive a second removable and rechargeable battery pack, an inverter within the housing, and an alternating current power outlet. The inverter is configured to receive output power from the first removable and rechargeable battery pack and the second removable and rechargeable battery pack. The inverter is configured to produce an alternating current power output. The alternating current power outlet is configured to receive the alternating current power output from the inverter. The inverter is configured to be disabled when the first removable and rechargeable battery pack is received in the first battery pack support and the second removable and rechargeable battery pack is not received in the second battery pack support.

Abstract: A method for conducting an operation including a power tool battery pack. The battery pack can include a housing, a first cell supported by the housing and having a voltage, and a second cell supported by the housing and having a voltage. The battery pack also can be connectable to a power tool and be operable to supply power to operate the power tool. The method can include discharging one of the first cell and the second cell until the voltage of the one of the first cell and the second cell is substantially equal to the voltage of the other of the first cell and the second cell.

Abstract: A lighting device including a light source, an input device, a power source configured to provide power to the lighting device, and one or more electronic processors. The one or more electronic processors are configured to receive an input signal to illuminate the light source from the input device and determine a first state-of-charge of the power source. The electronic processors are further configured to determine a first illumination output value based on the determined first state of charge and initiate a first ramp-down operation of the light source from the first illumination output value. The first ramp-down operation is configured to reduce an output of the light source as a percentage of the first illumination intensity over time. The electronic processors are also configured to continue the first ramp-down operation until the output of the light source reaches a predetermined illumination intensity.

Abstract: An electrical combination. The electrical combination comprises a battery pack configured to be interfaced with a hand held power tool, a control component, and a semiconducting switch. The transfer of power from the battery pack to the hand held power tool is controlled by the control component and the switch based on one of a battery pack state of charge and a respective state of charge of one of a plurality of battery cells. A discharge current of the battery pack is regulated based on the switch being controlled into one of a first state and a second state by the control component to selectively enable the transfer power from the plurality of battery cells to the hand held power tool.

Abstract: A work light including a body having a mount surface, a pair of ferromagnetic members coupled to the body and disposed adjacent the mount surface, and a recess defined in the mount surface in the space between the pair of ferromagnetic members. The pair of ferromagnetic members define a space therebetween. The recess is a keyhole slot configured to receive a nail from which the work light can be hung. The work light further includes a light source pivotably coupled to the body opposite the mount surface, such that the light source pivots relative to the body about a vertical axis when the work light is hung using the recess.

Abstract: An electrical combination. The electrical combination comprises a battery pack configured to be interfaced with a hand held power tool, a control component, and a semiconducting switch. The transfer of power from the battery pack to the hand held power tool is controlled by the control component and the switch based on one of a battery pack state of charge and a respective state of charge of one of a plurality of battery cells. A discharge current of the battery pack is regulated based on the switch being controlled into one of a first state and a second state by the control component to selectively enable the transfer power from the plurality of battery cells to the hand held power tool.

Abstract: A work light includes a body, a light source head, and a battery. The body includes a mount surface for mounting the work light to a structure. The light source head is pivotably connected to the body. The light source head is opposite the mount surface of the body. The battery is removably coupled to the body. The battery includes a support surface. The support surface is disposed outside of the body. The support surface is oriented perpendicular to the mount surface.

Abstract: A lighting device including a light source, an input device, a power source configured to provide power to the lighting device, and one or more electronic processors. The one or more electronic processors are configured to receive an input signal to illuminate the light source from the input device and determine a first state-of-charge of the power source. The electronic processors are further configured to determine a first illumination output value based on the determined first state of charge and initiate a first ramp-down operation of the light source from the first illumination output value. The first ramp-down operation is configured to reduce an output of the light source as a percentage of the first illumination intensity over time. The electronic processors are also configured to continue the first ramp-down operation until the output of the light source reaches a predetermined illumination intensity.

Abstract: A portable power source. The portable power source includes a housing, a first battery pack support configured to receive a first removable and rechargeable battery pack, a second battery pack support configured to receive a second removable and rechargeable battery pack, an inverter within the housing, and an alternating current power outlet. The inverter is configured to receive output power from the first removable and rechargeable battery pack and the second removable and rechargeable battery pack. The inverter is configured to produce an alternating current power output. The alternating current power outlet is configured to receive the alternating current power output from the inverter. The inverter is configured to be disabled when the first removable and rechargeable battery pack is received in the first battery pack support and the second removable and rechargeable battery pack is not received in the second battery pack support.

Abstract: An electrical combination. The combination comprises a hand held power tool, a battery pack and a controller. The battery pack includes a battery pack housing connectable to and supportable by the hand held power tool, a plurality of battery cells supported by the battery pack housing, each of the plurality of battery cells having a lithium-based chemistry, being individually tapped and having an individual state of charge. A communication path is provided by a battery pack sense terminal and a power tool sense terminal. The controller is operable to monitor a state of charge of a number of battery cells less than the plurality of battery cells and to generate a signal based on the monitored state of charge of the number of battery cells less than the plurality of battery cells, the signal being operable to control the operation of the hand held power tool.

Abstract: A portable power source. The portable power source includes a housing, a first battery pack support configured to receive a first removable and rechargeable battery pack, a second battery pack support configured to receive a second removable and rechargeable battery pack, an inverter within the housing, and an alternating current power outlet. The inverter is configured to receive output power from the first removable and rechargeable battery pack and the second removable and rechargeable battery pack. The inverter is configured to produce an alternating current power output. The alternating current power outlet is configured to receive the alternating current power output from the inverter. The inverter is configured to be disabled when the first removable and rechargeable battery pack is received in the first battery pack support and the second removable and rechargeable battery pack is not received in the second battery pack support.

Abstract: An electrical combination. The combination comprises a hand held power tool, a battery pack and a controller. The battery pack includes a battery pack housing connectable to and supportable by the hand held power tool, a plurality of battery cells supported by the battery pack housing, each of the plurality of battery cells having a lithium-based chemistry, being individually tapped and having an individual state of charge. A communication path is provided by a battery pack sense terminal and a power tool sense terminal. The controller is operable to monitor a state of charge of a number of battery cells less than the plurality of battery cells and to generate a signal based on the monitored state of charge of the number of battery cells less than the plurality of battery cells, the signal being operable to control the operation of the hand held power tool.

Abstract: A method and system for charging multi-cell lithium-based batteries. In some aspects, a battery charger includes a housing, at least one terminal to electrically connect to a battery pack supported by the housing, and a controller operable to provide a charging current to the battery pack through the at least one terminal. The battery pack includes a plurality of lithium-based battery cells, with each battery cell of the plurality of battery cells having an individual state of charge. The controller is operable to control the charging current being supplied to the battery pack at least in part based on the individual state of charge of at least one battery cell.

Abstract: An electrical combination including a power tool and a battery pack. The power tool includes power tool terminals. The battery pack is configured to be interfaced with the power tool. The battery pack includes a battery pack housing, at least three terminals, and a plurality of battery cells. The battery pack terminals include a positive terminal, a negative terminal, and a sense terminal. The at least three terminals are configured to be interfaced with the power tool terminals. The plurality of battery cells are arranged within and supported by the battery pack housing. Each of the battery cells has a lithium-based chemistry and a respective state of charge, and power is transferable between the battery cells and the power tool. A circuit is configured to monitor the battery cells, detect a charge imbalance among the battery cells, and prevent the battery pack from operating when the charge imbalance is detected.

Abstract: A method and system for charging multi-cell lithium-based batteries. In some aspects, a battery charger includes a housing, at least one terminal to electrically connect to a battery pack supported by the housing, and a controller operable to provide a charging current to the battery pack through the at least one terminal. The battery pack includes a plurality of lithium-based battery cells, with each battery cell of the plurality of battery cells having an individual state of charge. The controller is operable to control the charging current being supplied to the battery pack at least in part based on the individual state of charge of at least one battery cell.

Abstract: A work light includes a body, a light source head, and a battery. The body includes a mount surface for mounting the work light to a structure. The light source head is pivotably connected to the body. The light source head is opposite the mount surface of the body. The battery is removably coupled to the body. The battery includes a support surface. The support surface is disposed outside of the body. The support surface is oriented perpendicular to the mount surface.