In case a similar component-to-be-loaded is erroneously loaded on a main body side apparatus, contact of terminals are avoided. To this end, a video camera (main body side apparatus) 1 has a main body side terminal 30, and a battery pack (component-to-be-loaded) 100 has a battery side terminal (component-to-be-loaded side terminal) 120. In the vicinity of the battery side terminal of the component-to-be-loaded, a discriminating tab 111 is provided, and a blocking portion 19 is provided in the vicinity of the main body side terminal of the video camera (main body side apparatus) for determining whether or not its loading is permitted based on the combination of concave and convex engagement with respect to the above-mentioned discriminating tab, and when the loading is not permitted due to the interference between the blocking portion and the above-mentioned discriminating tab, an electric connection between the main body side terminal and the battery side terminal (component-to-be-loaded side terminal) is not to be established.

A battery pack and charger system includes a first battery pack having a first set of battery cells and configured to provide only a first operating voltage and a second battery pack having a second set of battery cells and configured to provide the first operating voltage and a second operating voltage that is different from the first operating voltage and a battery pack charger configured to be able to charge the first battery pack and the second battery pack.

A battery pack and charger system includes a first battery pack having a first set of battery cells and configured to provide only a first operating voltage and a second battery pack having a second set of battery cells and configured to provide the first operating voltage and a second operating voltage that is different from the first operating voltage and a battery pack charger configured to be able to charge the first battery pack and the second battery pack.

A multi-voltage battery pack including a converting system for converting the battery pack between a low voltage configuration and a high voltage configuration. The converting system includes a converter element moves between a first position and a second position to configure the battery pack between the low voltage configuration and the high voltage configuration. The converter element includes a set of contacts that mates with a set of contact pads to establish the voltage configuration.

A battery pack and charger system includes a first battery pack having a first set of battery cells and configured to provide only a first operating voltage and a second battery pack having a second set of battery cells and configured to provide the first operating voltage and a second operating voltage that is different from the first operating voltage and a battery pack charger configured to be able to charge the first battery pack and the second battery pack.

The invention discloses a power supply and an electronic cigarette having same. The power supply comprises a main body which comprises a mounting groove for accommodating an external battery. One end of the mounting groove is convexly provided with a first conductive contact and at least one supporting member, and a height at which the at least one supporting member protrudes is greater than a height at which the first conductive contact protrudes. The battery is provided with a contact head protruding from the body of the battery; when the battery is properly mounted in the mounting groove, the contact head is abutted against the first conductive contact establish an electrical connection; when the battery is reversely mounted in the mounting groove, the supporting member is abutted against the body of the battery so that the body of the battery is spaced apart from the first conductive contact.

A flash device system for photographic purposes includes: a flash holder having a battery accommodating cavity formed therein; a flash housing hinged onto the flash holder; and a battery, wherein the battery accommodating cavity includes: electrical access contacts; a battery locking protruding element; and a battery locking cavity, wherein the battery locking protruding element and the battery locking cavity are arranged on opposite inner side walls of the battery accommodating cavity and, wherein the battery comprises: electric contacts for engagement with the electrical access contacts in the battery accommodating cavity; a cavity locking protruding element and a cavity locking cavity for engagement with the corresponding battery locking protruding element and battery locking cavity in the battery accommodating cavity. The flash device system can also include a battery charger.

A battery module includes a plurality of batteries stacked together, and a busbar. Each of the plurality of batteries includes a battery-side first structure and a battery-side second structure that regulate the connection of the battery and the busbar. The busbar has a busbar-side first structure and a busbar-side second structure that regulate the connection of the busbar and each of the batteries. If the battery-side first structures of the plurality of batteries are combined with the busbar-side first structure, and the battery-side second structures of the plurality of batteries are combined with the busbar-side second structure, each of the batteries is connected with the busbar. Alternatively, if the battery-side first structure of any one of the batteries is combined with the busbar-side second structure, the one of the batteries or another one of the batteries is not connected with the busbar.

A housing assembly for use with one or more batteries includes a first subassembly, a second subassembly, a plurality of sleeves, and a plurality of support members. A sleeve includes a sidewall defining a longitudinal channel sized to retain a plurality of cells therein. A sleeve coupling mechanism corresponding to an end coupling mechanism of the first subassembly is at a first wall end portion of the sidewall, and another sleeve coupling mechanism corresponding to an end coupling mechanism of the second subassembly is at a second wall end portion of the sidewall. A support member includes a member coupling mechanism corresponding to an end coupling mechanism of the first subassembly is at a first member end portion of the support member and another member coupling mechanism corresponding to an end coupling mechanism of the second subassembly is at a second member end portion of the support member.

A power tool is provided including a power supply interface receiving a medium-voltage-rated removable battery pack having a maximum rated voltage in the range of 40 to 80 volts, and a brushless direct current (BLDC) motor. The motor includes a rotor and a stator having at least three stator windings corresponding to at least three phases of the motor, the rotor being moveable by the stator when the stator windings are appropriately energized within the corresponding phases, each phase being characterized by a corresponding voltage waveform energizing the corresponding stator winding. A multi-phase inverter bridge circuit is disposed between the power supply interface and the motor, and a controller is configured to output drive signals to the inverter bridge circuit to control flow of current from the battery pack to the motor such that the motor produces a maximum power output of at least 2500 watts.