Abstract: Various embodiments relate to mobile units. A mobile unit may include a number of electronic devices including a processor, a number of loads, and a modem. The mobile unit may further include a circuit board including the processor and logic configured to reset the processor, at least one load of the number of loads, and/or the modem responsive to receipt of a reset signal. The circuit board may also include a power switch-over circuit coupled to the processor and the logic and configured to switch power to at least some of the number of electronic devices from a primary battery to a secondary battery or from the secondary battery to the primary battery. Further, the circuit board may include a charge controller coupled to the secondary battery and configured to limit an amount of current conveyed to the secondary battery. Associated devices and methods are also disclosed.

Abstract: Various embodiments relate to mobile units. A mobile unit may include a number of electronic devices including a processor, a number of loads, and a modem. The mobile unit may further include a circuit board including the processor and logic configured to reset the processor, at least one load of the number of loads, and/or the modem responsive to receipt of a reset signal. The circuit board may also include a power switch-over circuit coupled to the processor and the logic and configured to switch power to at least some of the number of electronic devices from a primary battery to a secondary battery or from the secondary battery to the primary battery. Further, the circuit board may include a charge controller coupled to the secondary battery and configured to limit an amount of current conveyed to the secondary battery. Associated devices and methods are also disclosed.

Abstract: A better power output device is provided. A charging and power supply device having a power source in a housing, wherein the housing has USB power output terminals to which a load that receives DC output power is connected, AC power output terminals to which a load that receives AC output power is connected, a USB switch that receives an instruction from a user to output power from the USB power output terminals, and an AC switch that receives an instruction from the user to output power from the AC power output terminals, and the USB switch and the AC switch are disposed so as to match the arrangement order of the USB electric power output terminals and the AC electric power output terminals in the arrangement direction of the USB power output terminals and the AC power output terminals.

Abstract: A power storage system includes a plurality of power storage apparatuses and a control apparatus. The plurality of power storage apparatuses are connected in parallel to each other via respective switches. The control apparatus controls the switches, based on respective voltage values of the plurality of power storage apparatuses and respective resistance values of conductive paths of the plurality of power storage apparatuses. The control apparatus charges or discharges at least one of the plurality of power storage apparatuses.

Abstract: A stationary hybrid battery back-up system incorporates two different battery units that differ in terms of recharging efficiency, cycle life, power capability, depth of discharge threshold, temperature threshold, internal impedance threshold, charger rate efficiency and/or stand-by efficiency. The battery back-up system of the present invention comprises an auxiliary power supply that can be used to charge the first and second batteries and/or provide power to a load. When the operating voltage of the system drops, due to a power failure of a power source, the control system may couple the first and/or second battery unit to a load. The control system may have voltage threshold limits wherein it engages the first and second battery units to support the load demand. The first and second battery units may be charge by the auxiliary power supply when the operating voltage is above a threshold level.

Abstract: Systems described herein include a battery pack including one or more battery cells and a first resistive element connected to a positive electrode of a first battery cell. The systems also include an external device capable of receiving the battery pack. The external device includes a second resistive element, a switch, and a controller. The second resistive element is configured to be in series with the first resistive element upon the battery pack being received within the external device. The switch is positioned in series with the second resistive element and a common potential is coupled to both the battery pack and the external device. The controller is configured to activate the switch, measure a voltage between the first resistive element and the second resistive element in response to the switch being activated, and determine an identification of the battery pack based on the measured voltage.

Abstract: Embodiments of the present application provide a battery, a power consumption apparatus, a method and apparatus for producing a battery. The battery includes: a battery cell including a pressure relief mechanism disposed on a first wall; and a thermal management component, a first surface of the thermal management component being attached to the first wall, and the thermal management component being provided with a pressure relief zone; where the first wall is provided with a first restraint member, the thermal management component is provided with a second restraint member, and the first restraint member and the second restraint member are arranged to be mated, so that the pressure relief mechanism is arranged opposite to the pressure relief zone. A battery, a power consumption apparatus, a method and apparatus for producing a battery of the present application could enhance safety of the battery.

Abstract: An apparatus that includes a charger, which includes an electric vehicle (EV) connector, a first alternating current (AC) connector, a charger connector, an alternating current and direct current (AC/DC) converter, a DC/DC converter, a charger switch system, which includes a plurality of charger terminals, and a rechargeable battery system coupled between the AC/DC and DC/DC converters. The charger further includes a charger controller coupled to and configured to control the AC/DC converter, the DC/DC converter, and the charger switch system. Charger terminals of the plurality can be respectively coupled to the AC/DC converter, the DC/DC converter, the EV connector, the first AC connector, and the charger connector. The apparatus may also include a hub that includes a hub switch system, which is configured for connection to the charger connector.

Abstract: An apparatus includes a first authentication unit that performs an authentication process for determining whether an external apparatus is a predetermined external apparatus, a second authentication unit that performs an authentication process for determining whether a battery connected to the external apparatus is a predetermined battery, and a control unit that permits the battery to be discharged but restricts the battery from being charged regardless of whether the battery is the predetermined battery, in a case where the external apparatus is not authenticated as the predetermined external apparatus.

Abstract: A power control system measures individual battery cell voltages and temperatures of a plurality of series-connected battery cells utilizing an Analog Front End, a controller that collects and analyzes the data digitally transferred to it by the Analog Front End, and a Fuel Gauge. Processes performed within the controller are configured to provide optimized representations of the data to the Fuel Gauge to improve its performance.

Abstract: An electronic device and charging foot seat thereof are provided, where the electronic device adapted to be charged by a charger pad, and the charging foot seat includes a foot pad configured to be partially embedded into a casing of the electronic device, and a plurality of metal pins disposed through and protruding from the foot pad and configured to be electrically connected to at least one circuit board of the electronic device and configured to contact the charger pad so as to form a charging path over the circuit board and the charger pad for charging the electronic device.

Abstract: A power distribution device that couples to storage units is provided. The power distribution device a battery charger that indirectly charges batteries, such as for personal electronic devices. The device includes a top panel with a recess that receives the personal electronic devices. The device also includes interface components to couple the device to a modular tool storage unit.

Abstract: A holder includes a container and a curvilinear formed semi-rigid sheet coupled to curvilinear slots of opposing sides of the container to primarily move inside of the container as guided by the curvilinear slots to provide a self-adjusting container depth through spring tensioning to accommodate various thicknesses of portable electronic devices contained thereby.

Abstract: A power tool system includes a removable battery pack a first tool and a second tool. The first tool includes a first base housing that is selectively engageable with the removable battery pack and a first tool portion connected to the first base housing by a first connecting section. The second tool includes a second base housing that is selectively engageable with the removable battery pack and a second tool portion connected to the second base housing by a second connecting section. The second tool base housing houses a second controller that provides a proportional power delivery system for the second tool and second tool base housing also includes a second actuator for providing user control of the second tool.

Abstract: Methods, apparatuses, and non-transitory computer-readable storage mediums are provided for identifying a battery. The method may be applied to electronic equipment. The electronic equipment may detect an electrical parameter of a cell under test in the battery of the electronic equipment. The electronic equipment may also determine a similarity between the cell under test and a preset cell according to the electrical parameter, the preset cell meeting a first preset matching relation with the electronic equipment. The electronic equipment may further determine, according to the similarity, whether the cell under test meets the first preset matching relation with the electronic equipment, acquiring a determination result.

Abstract: A fast rechargeable battery assembly and a battery recharging equipment configured to recharge a battery in a very short period of time, by using a plurality of independent power supply units which recharge simultaneously a battery split in a plurality of independent battery modules, each one of these having a plurality of battery cells connected to a pair of module independent terminals positive and negative, which are direct connected to an independent power supply unit—in recharging mode, and in supplying mode all of these being connected to a battery main terminal. This functionality is realized for on-board recharging by using a contact plate and a plurality of switches, changeover witches and command switches, and for off-board recharging by using a recharging and a supplying contact plate.

Abstract: Disclosed is a universal jig for charging and discharging a secondary battery cell. The universal jig includes a cell zig assembly including: a cell receiving part for receiving the secondary battery cell thereon; and a zig for a positive electrode terminal and a zig for a negative electrode terminal disposed above the cell receiving part and in contact with a positive electrode terminal and a negative electrode terminal of the secondary battery cell to apply current thereto, respectively; and a zig rotation inducing assembly connected, via a rotation center shaft thereof, to one face or an opposite face of the cell zig assembly on which the zig for the positive electrode terminal and the zig for the negative electrode terminal are disposed, wherein the zig rotation inducing assembly allows the cell zig assembly to rotate around the rotation center shaft.

Abstract: A method for controlling operation of garden equipment with a battery pack including a control unit for performing the method, when the battery back is inserted into a recess of the garden equipment and in data communication, via a data bus, with a control unit of the garden equipment. The control unit reads an identifier of the garden equipment, which identifier is used to retrieve operational control data for the specific garden equipment from a memory medium of the control unit. The control unit also collects sensor data from garden equipment sensors and controls the operation of the garden equipment from the control unit based on the retrieved control data and the collected sensor data.

Abstract: A battery pack includes: a connector holder that is fixed to an exterior case and has a second main surface that faces an inside of the exterior case; a floating connector connected with a center of the connector holder in such a manner that the floating connector floats such that an orientation of the floating connector is variable upward, downward, leftward, and rightward; and a lead wire fixed to an inner surface of the floating connector. The lead wire extends through an inside of the exterior case. The Lead wire) connects the floating connector with a circuit board. The connector holder has a guide pipe on a second-main-surface side of connector holder. A shape of an edge of the guide pipe is a circle that has a cut-off portion. The cut-off portion has a radius of curvature that is larger than a radius of curvature of the circle.

Abstract: The invention relates to a device, in particular a power bank (20), comprising: at least one port (24) for connecting the device to a terminal (10); at least one memory (22) for storing useful data; at least one rechargeable battery (26) for supplying a charging current to the terminal; at least one computer unit (21); wherein the computer unit (21) is configured, in particular programmed, a) to send an authentication request (Req1) to the terminal (10); and b) to receive a response (Res1) to the authentication request (Req1), wherein the charging current is interrupted within a charging interval (L1, L2, L3) or the charging interval (L1, L2, L3) is not initialized if successful authentication is not carried out by means of the authentication request and response.

Abstract: A charging management circuit, a terminal and a charging method are provided. The charging management circuit includes: a first output end, configured to output constant current to a cell, for performing constant current charging on the cell; a second output end, configured to supply power to a load in a constant current charging process; and a control circuit, configured to stop the constant current charging when a voltage across both ends of the cell reaches a constant current charging cut-off voltage of the constant current charging, wherein the constant current charging cut-off voltage is greater than a rated voltage of the cell, and is configured such that an actual voltage of the cell is not overvoltage in the constant current charging process.

Abstract: A power supply apparatus supports USB-PD (Universal Serial Bus-Power Delivery) specification. A bus voltage VBUS is transmitted via a bus line. A first power supply circuit generates a first bus voltage having a first voltage level. A second power supply circuit generates a second bus voltage having a second voltage level that is higher than the first voltage level. A first switch is arranged between the bus line and an output terminal of the first power supply circuit. A second switch is arranged between the bus line and an output terminal of the second power supply circuit. A control circuit receives a control signal S1 via the bus line from a power receiving apparatus, which is a power supply target. The control circuit is structured to control the first switch and the second switch based on the control signal S1.

Abstract: Electric vehicles with easily configurable and detachable battery modules are disclosed. An electric vehicle may include a battery module that includes a plurality of modular battery packs, each of which can be detached without affecting the normal functions of the electric vehicle. The number of modular battery packs installed on the electric vehicle can be configured by the manufacturer, retailer, and/or customer based on the customer's needs. Systems and methods of servicing electric vehicles with modular battery packs are also disclosed. Battery swapping and/or renting stations allows electric vehicle users to swapping batteries whose charges run low with fully charged batteries and/or to rent additional batteries to temporary use. A centralized or distributed data system may be used to track each modular battery pack's conditions such use history, capacity degrade, charge cycles, etc. The costs battery swapping and/or renting can be based conditions of the battery packs.

Abstract: A dual port battery charging system comprises a charger, a microcontroller, a first switching unit, a second switching unit, a first charging interface and a second charging interface, wherein the microcontroller is coupled with the first switching unit, the second switching unit, the first charging interface and the second charging interface to detect a voltage and a current of a first battery pack or a second battery pack, and the microcontroller can control the first switching unit and the second switching unit to charge the first battery pack and the second battery pack separately or alternately.

Abstract: A battery harvesting device and methods are disclosed for powering a load with a plurality of standardised batteries of different battery chemistries, each of the standardised batteries having a battery output voltage lower than a nominal voltage. The harvester comprises a power bus for attachment to the load, at least one receptacle arranged into each of a plurality of clusters, each receptacle configured for receiving one of the standardised batteries, each cluster further comprising electronics comprising an input connected to the receptacle and an output connected to the power bus, and a DC-DC boost circuitry for raising a battery output voltage of a connected one of the standardised batteries, and a processor for controlling the electronics such that each of the outputs connected the power bus is maintained at the nominal voltage.

Abstract: One or more embodiments are directed to a battery charger that can support multiple battery applications with a single USB type-C port. The architecture can be easily extended to support more applications such as those including two or more USB Type-C ports by adding additional voltage regulators. Additionally, the architecture can easily be extended to support additional batteries by adding corresponding battery chargers. Some embodiments enable supplying two or more system voltages and charging two or more batteries simultaneously using a single adapter and/or port. Other embodiments enable supplying voltage to On the Go devices from two or more batteries simultaneously.

Abstract: A charging stand includes a casing and a quick release assembly. The casing includes a first sidewall, a second sidewall, and a bottom plate. The first and second sidewalls are disposed oppositely and connected to two edges of the bottom plate, respectively, to form a receiving chamber. The quick release assembly includes a body and a fixing element. When the quick release assembly is demountably disposed in the receiving chamber, the fixing element is engagedly disposed on the bottom plate.

Abstract: An electronic device includes an interface unit that receives power from an external device, a charging unit that charges a battery with power received from the external device via the interface unit, and a control unit that stops operations of units excluding the interface unit and the charging unit, when the charging unit charges the battery with the power received from the external device via the interface unit and a predetermined function is selected.

Abstract: Disclosed is a battery pack including: at least one battery module including a plurality of battery cell; and a battery management system (BMS) configured to determine an operation mode of a battery pack according to an enabled switch signal between at least two switch signals, which wake up the battery pack, and control the battery pack according to the determined operation mode.

Abstract: A headset includes two earcups that overlie and seal around the wearer's ears. The headset includes a system for suspension of the earcups on a helmet, as well as a speaker enclosure that provides increased structural strength without taking up additional space on the board. The headset also includes a battery compartment that can accept either one of two different size batteries to power the electrical components of the headset.

Abstract: A wireless charging receiver as described herein includes a configurable rectifier configured to convert an alternating current input to a direct current output in a single processing stage, wherein the configurable rectifier comprises one or more diodes, and a controller communicatively coupled to the one or more diodes and configured to select one of a plurality of mode cycling schemes and control a present operating mode of the active diodes according to a selected mode cycling scheme. Additionally, an active diode as described herein includes a comparator, a gate driver, a power transistor, and a delay compensation circuit for compensation of at least one of a turn-on delay and a turn-off delay of the active diode, the delay compensation circuit including analog feedback loops.

Abstract: A connector holding mechanism includes a biasing member provided in a through hole formed in a bottom plate of a storage body, a cover having a connector insertion hole and an inclined surface which is fixed to the through hole, a connector, in which a terminal is loosely inserted into the connector insertion hole, and a flange portion protruding from an outer periphery of the housing biased by the biasing member. When the connector is waiting to be fitted to a stored object, the connector is held in a posture where the terminal is inclined due to abutment between the inclined surface and the flange with respect to a virtual line perpendicular to the bottom surface, and when the connector is fitted to the stored object, the connector is held in a posture where the terminal is vertical along the virtual line.

Abstract: The device for use in an explosive atmosphere zone has a device housing and at least one energy supply part that is provided with at least one battery or at least one rechargeable battery as well as energy-associated supply contacts. The energy-associated supply contacts interact with device-associated supply contacts when the energy supply part is connected to the device. The energy-associated and device-associated supply contacts have connected upstream thereof switches that, prior to separation of the energy supply part from the device, can be controlled by a circuit such that the switches deenergize the energy-associated and the device-associated supply contacts.

Abstract: Disclosed herein is a battery pack configured to have a structure including at least one module assembly configured to have a structure in which battery modules, each of which has a structure in which a plurality of unit cells is stacked in a state in which unit cells are electrically connected to each other, are arranged such that the battery modules are adjacent to each other, a pair of side plates coupled to each other for covering opposite sides of the module assembly, a base plate having fastening parts, which are coupled to the side plates, formed at one surface thereof and an external mounting part, which is mounted to an external structure, formed at the other surface thereof, and a sheathing cover coupled to the base plate while covering the module assembly.

Abstract: The present invention discloses devices and methods for adaptive fast-charging of mobile devices. Methods include the steps of: firstly determining whether a first connected component is charged; upon firstly determining the first connected component isn't charged, secondly determining whether the first connected component is adapted for rapid charging; and upon secondly determining the first connected component is adapted for rapid charging, firstly charging the first connected component at a high charging rate via a charging device. Preferably, the charging device is selected from the group consisting of: a rapid charger and a slave battery. Preferably, the first connected component is selected from the group consisting of: a mobile device and a slave battery. Preferably, the high charging rate is selected from the group consisting of: greater than about 4 C, greater than about 5 C, greater than about 10 C, greater than about 20 C, greater than about 30 C, and greater than about 60 C.

Abstract: Provided is a platform with backup power and burst load power needs met using a supercapacitor.

Abstract: A battery management, including a voltage measuring unit electrically connected to multiple lithium iron phosphate (LFP) cells in an LFP battery, the LFP cells being connected in series, to individually measure voltage of each LFP cell and output a voltage value indicative of the measured voltage, and a control unit configured to output a first signal requesting the start of a charging process of the LFP, and when at least one of the voltage values of the multiple LFP cells outputted from the voltage measuring unit reaches a threshold voltage value while the charging process is performed by the first signal, output a second signal requesting the stop of the charging process and output a third signal requesting the start of a discharging process.

Abstract: A battery fuel gauge circuit is coupled to a rechargeable battery. A first A/D converter samples a voltage VBAT of the battery. A logic circuit receives the output of the first A/D converter. The logic circuit acquires the output of the first A/D converter when an electronic device mounting the battery fuel gauge circuit is turned on for the first time.

Abstract: Electric vehicles that use replaceable and exchangeable batteries and systems are provided. A system includes a battery carrier for holding a plurality of batteries. The battery carrier is connectable to a power source and the plurality of batteries are rechargeable and replaceable into and out of the battery carrier. The battery carrier includes slots for receiving the plurality of batteries and control systems for communicating over a network. The control systems are configured for identifying presence of batteries in the slots of the battery carrier and charge level of batteries present in the slots. The system further includes a server that communicates over the network with the control systems of the battery carrier. The server is part of a cloud system that manages access to user accounts. The user accounts are accessible via applications executed on user devices.

Abstract: An energy management system for a vehicle has a battery system including a first battery pack with a first set of battery cells and a second battery pack with a second set of battery cells. The first battery pack has a relatively high power density in comparison to the second battery pack, and the second battery pack has a relatively high energy density in comparison to the first battery pack. An electronic controller is operatively connected to the battery system and is configured to control charging and discharging of the first battery pack and the second battery pack. The first battery pack and the second battery pack are configured to be separately charged and discharged. The electronic controller prioritizes charging and discharging of the first battery pack over the second battery pack.

Abstract: The present disclosure provides a charging method and an electronic device, in the field of electronic technology. The charging method is applied in electronic devices. The electronic device includes a charging circuit including a first charging path, a second charging path, and a parallel charging path operating, the method comprising: disconnecting the first charging path, when the charging circuit is in the first charging mode and the electronic device is detected to be connected to the second charging mode; obtaining a charging protocol used in the second charging mode; and determining whether to adopt the first charging path, the second charging path, or the parallel charging path to charge the electronic device according to the charging protocol.

Abstract: A power converter and method are presented. The converter provides a ground terminal, an input terminal and an output terminal. The power converter includes first, second and third flying capacitor coupled to a network of switches and a driver. The network of switches has a first switch coupled to the input terminal; a second switch to couple the first flying capacitor to the third flying capacitor; and a third switch to couple the second flying capacitor to the third flying capacitor; The driver is adapted to drive the network of switches with a sequence of states during a drive period. The sequence of states includes a first state and a second state. In the first state the ground terminal is coupled to the output terminal via a first path with the first flying capacitor and the third flying capacitor, and via a second path with the second flying capacitor.

Abstract: Mobile client device wireless charging, communication, and authentication techniques are described. In one or more implementations, a method performed by a mobile client device includes establishing wireless communication with a substrate having an integrated electromagnetic inductive coil in accordance with the mobile client device being at a distance proximal to the substrate to achieve an inductive connection. After establishing the wireless communication, the method includes receiving wireless inductive power from the substrate, establishing communication with a device via the wireless communication with the substrate, and after establishing communication with the device, operating, via the wireless communication, as a user input device for the device by outputting a user interface on a display device of the mobile client device, the user interface being operable to receive user input for the device.

Abstract: A simple battery and battery charger. In one embodiment, the battery charger includes an output terminal that provides a charging voltage Vout and charging current Iout. The battery is contained in a battery pack having an input terminal, which can be connected to the output terminal in order to receive Vout and Iout. The battery charger may include a first circuit for controlling the magnitude of Vout. The battery pack may include a second circuit that generates a control signal when the output terminal is connected to the input terminal. The first circuit is configured to control the magnitude of Vout based on the control signal.

Abstract: A 3-D “phase change heat exchange” structure and method are used in a rechargeable battery to dissipate heat from surfaces of the battery cells and lower the temperature inside the battery cells. The battery cells are placed inside an enclosure and spaced apart from each other with free spaces in between. A liquid to vapor phase change material (L-V PCM) is provided inside the enclosure. A hydrophilic thin film or wick or fiber structure is provided on the cell surfaces to help form a thin liquid layer of the L-V PCM over cell surfaces. During operation, the L-C PCM is evaporated at the cell surfaces and condenses back to a liquid either on the battery enclosure or in an external heat exchanger, and drips back on top of the cells. The designs extend the battery life and improve the battery performance significantly.

Abstract: Systems and methods relate to a charger and a rechargeable device. The rechargeable device includes a power manager and a power storage device. The power manager may include one or more diodes and a controller configured to detect a charging current, provide a managed power output, and modulate the charging current to communicate through the current. The charger may include controller configured to store a device identifier in memory associated with a last charge state, determine whether a retrieved device identifier matches, and provide an indication of a current charge state in response to a match. The controller of the charger may be configured to send an electrical pulse to the rechargeable device and determine a polarity for charging the device.

Abstract: In a battery system that connects a plurality of types of batteries through a switch SW, when the switch SW is switched at a voltage (charge rate), it has been possible to increase a stored charge during charging, depending on the DC resistance of the battery. An object of the present invention is to provide switch SW switching control so that the stored charge can further be increased. A first feature of the present invention is to provide a battery system in which a first battery and a second battery are connected in parallel through the switch SW, including an estimator which estimates the charging current by measuring the resistance and OCV of each battery. The battery system can further increase the stored charge by switching to a switch SW combination that can increase the stored charge.

Abstract: The technology described in this document can be embodied in a method of using a silver-zinc rechargeable battery to power a device. The method includes drawing, in a first mode of operation of a power management circuit, a first current from the battery to power the device. The first current is selected such that a target percentage of a capacity of the battery is discharged in a predetermined time of use of the device. The method also includes switching to a second mode of operation after the target percentage of the capacity of the battery is discharged. In the second mode of operation, a second current is drawn from the battery, wherein the second current is less than the first current. The method further includes powering the device using the second current.

Abstract: The modular cell phone storage locker may comprise a cabinet with one or more doors. The interior space of the cabin may comprise one or more internal compartments defined by the exterior walls of the cabinet and internal dividers. A charging port and a disinfecting device may be located within each compartment. The doors may be prevented from opening by a lock, which is responsive to a timer. Locked periods and unlocked periods may be defined through a keypad on an operator panel. While locked, cell phones left in a compartment may be recharged and disinfected. A software application on the phone may prevent usage of the phone and modify phone operation during locked periods. One or more time displays visible on the exterior of the cabinet may display information pertinent to the operation of the timer. A fingerprint reader may allow administrator access to the lock.

Abstract: A system for transmitting data between components of an industrial vehicle that are powered by electricity received through a power line is provided. The system includes a first electrical choke with a conductor arranged to pass through the first electrical choke and to connect a first component to the power line, and a first communication circuit for at least one of sending and receiving signals and having a transmission wire for carrying the signals. When the first communication circuit transmits a communication signal, the communication signal passes along the transmission wire through the first electrical choke in a first direction, and subsequently the communication signal passes along the conductor through the first electrical choke in a second direction opposite to the first direction thereby cancelling attenuation of the communication signal by the first electrical choke.