Battery unit for an electronic price label and an electronic price label, which includes a separate, external, replaceable battery unit having a battery, and a fastening means, which may be detachably fasten the battery unit to the frame part of the electronic price label.

A printing apparatus, having a casing, a printer, and a battery cover, is provided. The casing includes a battery compartment, to which a battery is attachable, and a terminal arranged inside the battery compartment. The printer is powered by the battery to print an image on a printable tape. The battery cover is attachable to the casing and, when at an attached position, covers at least a part of the battery compartment. The casing includes a guide arranged outside the battery compartment to guide the battery cover toward the attached position in the casing. The battery cover includes a first wall portion, which contacts the guide at an outer face thereof and slides along the guide as the battery cover moves toward the attached position, and a pressing portion to press the battery in the battery compartment against the terminal as the first wall portion slides along the guide.

A printing apparatus, having a casing, a printer, and a battery cover, is provided. The casing includes a battery compartment, to which a battery is attachable, and a terminal arranged inside the battery compartment. The printer is powered by the battery to print an image on a printable tape. The battery cover is attachable to the casing and, when at an attached position, covers at least a part of the battery compartment. The casing includes a guide arranged outside the battery compartment to guide the battery cover toward the attached position in the casing. The battery cover includes a first wall portion, which contacts the guide at an outer face thereof and slides along the guide as the battery cover moves toward the attached position, and a pressing portion to press the battery in the battery compartment against the terminal as the first wall portion slides along the guide.

A battery device includes a main body and a rear cover removably connected to the main body. The main body has a first battery receiving compartment. The rear cover has a second battery receiving compartment. The first battery receiving compartment is configured to receive at least two batteries while the second battery receiving compartment is configured to receive at least one battery.

For the battery device, since the back cover is provided with the second battery receiving compartment cooperating with the first battery receiving compartment in the body, the apparatus applying the battery device has at least two supportable power levels. In this way, the battery device can be switched between a low power and a high power, eliminating the need of another battery device.

A cable light includes a battery receptacle that is electrically coupled to a first light module and a second light module. The battery receptacle includes a battery port that receives and retains a battery, such as a power tool battery pack. The first light module and the second light module each include a housing supporting a lens, a light emitter such as an LED, a reflector, and a hanger to hang the light modules on a workpiece. The first light module is electrically coupled to the battery receptacle, and the second light module is electrically coupled to the battery receptacle via a connection with the first light module. The battery receptacle communicates electrical power from the battery pack to the light modules to power the light emitters.

A battery pack which has cell units in which top-side and bottom-side battery cells are connected in series, and is capable of switching the connection state of the cell units, wherein a control unit monitors voltage imbalances between the plurality of cell units, and also monitors whether or not a cell unit contact failure has occurred. In order to stop a charging/discharging when a contact failure occurs, a signal (abnormality stoppage signal or charging stoppage signal) for stopping discharge is produced and outputted to the electrical device body-side.

A battery pack which has cell units in which top-side and bottom-side battery cells are connected in series, and is capable of switching the connection state of the cell units, wherein a control unit monitors voltage imbalances between the plurality of cell units, and also monitors whether or not a cell unit contact failure has occurred. In order to stop a charging/discharging when a contact failure occurs, a signal (abnormality stoppage signal or charging stoppage signal) for stopping discharge is produced and outputted to the electrical device body-side.

An electrical apparatus includes first and second battery interfaces disposed on a housing for electrically and mechanically connecting first and second battery packs in series. A controller is disposed within the housing and includes an apparatus microprocessor that receives first and second communication signals respectively outputted from respective microprocessors of the first and second battery packs. A first signal communication path communicates the first communication signal from the first battery pack microprocessor to the apparatus microprocessor by shifting a first voltage range of the first communication signal to a second voltage range that is suitable for inputting into the apparatus microprocessor. A second signal communication path communicates a third communication signal from the apparatus microprocessor to the first battery pack microprocessor by shifting the second voltage range of the third communication signal to a first voltage range that is suitable for inputting into the first battery pack microprocessor.

An electrical apparatus includes first and second battery interfaces disposed on a housing for electrically and mechanically connecting first and second battery packs in series. A controller is disposed within the housing and includes an apparatus microprocessor that receives first and second communication signals respectively outputted from respective microprocessors of the first and second battery packs. A first signal communication path communicates the first communication signal from the first battery pack microprocessor to the apparatus microprocessor by shifting a first voltage range of the first communication signal to a second voltage range that is suitable for inputting into the apparatus microprocessor. A second signal communication path communicates a third communication signal from the apparatus microprocessor to the first battery pack microprocessor by shifting the second voltage range of the third communication signal to a first voltage range that is suitable for inputting into the first battery pack microprocessor.

A power tool includes a housing. A motor is housed in the housing. A platen is driven by the motor. The housing includes a first housing part, a second housing part and a third housing part. The housing defines a battery receptacle portion configured to receive a removable battery pack which powers the motor. Each of the first housing part, the second housing part and the third housing part form part of the battery receptacle portion.