Abstract: A battery holder (1) for receiving a coin cell (6) includes an insulative housing (2) and a first and a second contacts (4, 5) received in the insulative housing. The coin cell includes a positive pole (61) and a negative pole (62) with a smaller diameter than the positive pole thereby forming an annular receiving room (63) around the positive pole. The insulative housing includes a base plate (21), a bulge (22) and a number of chimbs (24) extending upwardly from the base plate and a protrusion (34) at a junction between the base plate and the bulge. The protrusion is mating with the receiving room around the positive pole for preventing the coin cell from reverse insertion.

Abstract: A battery (6) includes a first end (61) and an opposite second end (63). A first mechanical connecting member (611) and a second mechanical connecting member (631) are provided on the first and second ends respectively. The first mechanical connecting member is engagable with the second mechanical connecting member of another similar battery. The second mechanical connecting member is engagable with the first mechanical connecting member of another similar battery. Thus the battery provides stabilized electrical connection with another similar battery. Preferably, the first mechanical connecting member includes two protrusion, and the second mechanical connecting member includes two receptacle engagingly receiving the protrusions of another similar battery. Each protrusion may for example be cylindrical, conical, annular, or parallelepiped-shaped. The battery may for example be cylindrical, parallelepiped-shaped, or coin-shaped. A battery assembly (600) using two or more such batteries is also provided.

Abstract: A battery holder includes front and rear end blocks connected by opposite side walls, defining an interior space therebetween for receiving a battery having a flat negative terminal and a projected positive terminal on opposite ends. Negative and positive electrodes are attached to inner surfaces of the front and rear end blocks for electrically engaging the negative and positive terminals of the battery. The positive electrode includes a central contact engageable with a free end of the positive terminal and a curved secondary contact for retainingly engaging a circumferential surface of the projected terminal. Two releasing members are positioned under the battery and attached to the positive electrode whereby when the positive electrode is manually disengaged from the positive terminal to release the battery, the releasing members are forced to drive the battery out of the holder thereby automatically ejecting the battery out of the holder.

Abstract: A rechargeable battery pack includes a rechargeable battery having a first electrode and a second electrode; a circuit assembly disposed at one end on a side of a sealing portion of the rechargeable battery; a battery protection circuit for protecting the rechargeable battery from overcharging, the battery protection circuit arranged on a side of the circuit assembly which faces the sealing portion of the rechargeable battery; a plurality of input and output terminals arranged on another side of the circuit assembly, said input and output terminals to which said first electrode and said second electrode are respectively each connected via the battery protection circuit, thereby constituting an intermediate unit in which the rechargeable battery and the circuit assembly are integrated; and an outer case for sealing therein said intermediate unit, the outer case having openings formed at locations corresponding to the input and output terminals.

Abstract: A method of attaching a battery cell in an apparatus acted upon by centrifugal force avoids an extreme decline in discharge capacity of the battery cell when acted upon by the centrifugal force. The battery, of the type including a positive polarity material and a negative polarity material which are placed in opposition in a thickness direction of a battery case with an intervening separator disposed therebetween, and a liquid electrolyte packed inside the battery case, is mounted in the apparatus, oriented such that a negative polarity material side of the battery cell faces generally in a direction in which the centrifugal force acts on the apparatus, and an angle of inclination of a thickness direction of the battery cell is within a range of 0 to about 60 degrees relative to the direction of the centrifugal force.

Abstract: A battery holder (1) for receiving a coin cell (6) includes an insulative housing (2) and a first and a second contacts (4, 5) received in the insulative housing. The coin cell includes a positive pole (61) and a negative pole (62) with a smaller diameter than the positive pole thereby forming an annular receiving room (63) around the positive pole. The insulative housing includes a base plate (21), a bulge (22) and a number of chimbs (24) extending upwardly from the base plate and a protrusion (34) at a junction between the base plate and the bulge. The protrusion is mating with the receiving room around the positive pole for preventing the coin cell from reverse insertion.

Abstract: A storage battery includes a housing, a groove portion formed on one end surface of the housing, a pair of electrode terminals formed on one end surface of the groove portion, and an engaging concave portion formed in the vicinity of the other end surface on the upper surface of the housing. A battery housing portion includes a housing concave portion capable of housing the storage battery, a pair of connection terminals formed on one inner wall of the housing concave portion to be connected to the electrode terminals of the storage battery, a convex portion formed in a protruded manner at a position corresponding to the groove portion on the one inner wall, and an engaging protrusion portion formed in a protruded manner at a position corresponding to the engaging concave portion on the other inner wall of the housing concave portion.

Abstract: A Solid Oxide Regenerative Fuel Cell (SORFC) system stores waste heat from the fuel cell in a heat storage material during the discharge mode. The heat is then used to heat water to be electrolyzed during the charge mode.

Abstract: A method and associated apparatus for preventing applying a reverse polarity voltage to an electronic circuit from a coin cell used to power such circuit by providing a first insulating wafer over the top conductive surface of a coin cell and a second insulating wafer over the bottom conductive surface of the cell. The first wafer has a central opening and the second wafer is designed to cover the portion of the bottom conductive surface corresponding to the opening of the first wafer so that when the two wafers of the protection system are placed over the coin cell with the first wafer and the insulating area positioned on the top and bottom conductive surfaces respectively, the insulating area extends fully under the first opening.

Abstract: A battery container capable of stably accommodating AA type batteries, a CRV3 battery, and a customized battery manufactured for exclusively use with a particular device. The battery container includes a main body which accommodates two AA type batteries, one CRV3 battery, or one customized battery wider than the CRV3 battery and having a first wrong-insertion preventing element in a lateral extension portion, and a cover which is opened or closed to allow a battery to be inserted into or drawn out of the main body and which keeps the battery in the main body during use.

Abstract: A printed circuit board with a coin type electric element of the present invention has the coin type electric element, and printed circuit board, on which the coin type electric element is fixed by soldering. The coin type electric element have a coin exterior case formed of metal and in a coin shape with an opening; a sealing plate, which is fixed on the opening of the coin exterior case, sealing the coin exterior case; and an insulating seal interposed between the coin exterior case and the sealing plate. The coin exterior case and the sealing plate are composed of a pair of terminals, A lead, whose tip portion is bent toward a surface side of a first terminal face, is connected to a second terminal face of the coin type electric element. A soldering face to be soldered by reflow soldering is provided at the tip portion.

Abstract: A method of encapsulating a plurality of OLED devices fabricated upon a substrate is described, the steps of said method comprising: fabricating a plurality of OLED devices on a substrate; depositing at least one planarization layer upon said OLED devices; hardening said at least one planarization layer in a patterned manner such that the hardened region substantially covers said OLED device; removing areas of the at least one planarization layer that are not hardened; and selectively depositing at least one barrier layer over said hardened region.

Abstract: A battery holder includes front and rear end blocks connected by opposite side walls, defining an interior space therebetween for receiving a battery having a flat negative terminal and a reduced positive terminal on opposite ends. Negative and positive electrodes are attached to inner surfaces of the front and rear end blocks for electrically engaging the negative and positive terminals of the battery. Flanges are formed on the inner surface of the front end block for holding the negative terminal side of the battery. Opposite raised portions are formed on the inner surface of the rear end block defining a channel for receiving the positive electrode. The channel is sized only to accommodate the reduced positive terminal so as to prevent the battery to be positioned in an incorrect orientation.

Abstract: A battery body (27) has positive and negative battery electrodes (29, 30), which are provided in two accommodation spaces (32, 33) surrounded by an insulating wall portion (27a) that is an outer wall thereof, and also has terminal insertion openings (32a, 33a) adapted to permit only battery terminals, which correspond to the battery electrodes (29, 30) accommodated in the accommodation spaces (32, 33), respectively, to be fitted thereto. Each of the battery terminals (24, 25) has a connecting flat plate portion (24a, 25a) that has a transversal section of a predetermined shape and can be fitted into a corresponding one of the terminal insertion opening (32a, 33a). One of the terminal insertion openings (32a) has a nearly rectangular opening having an opening width (a1), which is wider than an opening width (c1) of the other terminal insertion opening (33a), and also having an opening height (b1), which is lower than an opening height (d1) of the latter terminal insertion opening (33a).

Abstract: An electrical rechargeable battery having positive and negative electrodes arranged in a housing with separators between them, and having an electrolyte, at least one end pole is surrounded by a contact protection device in the form of a wall which surrounds the end pole, can rotate freely and is composed of insulating material. Electrical contact can be made only from above through a slot in the contact protection device, which surrounds the end pole. The end pole is protected against direct contact from above by means of an electrically insulating pole cap, which is screwed to the end pole.

Abstract: A rechargeable battery pack includes a rechargeable battery having a first electrode and a second electrode; a circuit assembly disposed at one end on a side of a sealing portion of the rechargeable battery; a battery protection circuit for protecting the rechargeable battery from overcharging, the battery protection circuit arranged on a side of the circuit assembly which faces the sealing portion of the rechargeable battery; a plurality of input and output terminals arranged on another side of the circuit assembly, said input and output terminals to which said first electrode and said second electrode are respectively each connected via the battery protection circuit, thereby constituting an intermediate unit in which the rechargeable battery and the circuit assembly are integrated; and an outer case for sealing therein said intermediate unit, the outer case having openings formed at locations corresponding to the input and output terminals.

Abstract: An electrochemical cell is provided that has a negative terminal cover with a hole therein or a raised portion with notches therein to provide adequate air ingress during the coating of a non-conductive material on the raised portion of the negative terminal. The addition of the hole or notches in the negative terminal cover prevents a vacuum from forming and thereby prevents migration of the non-conductive material toward the center of the negative terminal cover. The process of making an electrochemical cell with a negative terminal cover that has a hole therein or has a raised portion with notches therein is also provided.

Abstract: A battery cell 10 is attached in an apparatus loaded in a revolving body, etc., such that the negative electrode 2 side of the battery cell 10 is oriented, within a prescribed angular range, in the direction in which centrifugal force acts.

Abstract: A battery cell 10 is attached in an apparatus loaded in a revolving body etc., such that the negative electrode 2 side of the battery cell 10 is oriented, within a prescribed angular range, in the direction in which centrifugal force acts.

Abstract: A battery cell that can be combined with one or more identical cells in a stacked arrangement in which the cells are electrically connected in either series or in parallel includes a housing having integral connectors facilitating releasable attachment of the battery cell to an identical battery cell. In one embodiment, the battery cell is provided with a plurality of positive terminals and a plurality of negative terminals, whereby stacking of the batteries in either of two different orientations is facilitated to achieve either a parallel electrical connection or a series electrical connection.

Abstract: A battery (B) includes electrodes (11a, 11b) and engaging portions (10a, 10b) formed by recessing portions of the battery (B) around the electrodes (11a, 11b), and recesses (14a, 14b, 23a, 23b) are formed in side surfaces of the engaging portions (10a, 10b). The recesses (14a, 14b, 23a, 23b) are symmetrically arranged in the left and right engaging portions (10a, 10b). Transversely symmetrical identification pieces (19a, 19b) project from the leading ends of terminals (15a, 15b). In the case of a correct correspondence of the electrodes (11a, 11b) and the terminals (15a, 15b), the identification pieces (19a, 19b) fit into the recesses (14a, 14b, 23a, 23b), enabling assembling of the terminals (15a, 15b) with the electrodes (11a, 11b). In the case of an incorrect correspondence, the identification pieces (19a, 19b) cannot be fitted into the recesses (14a, 14b, 23a, 23b) and interfere with the upper surface of the battery (B), making assembling impossible.

Abstract: A battery terminal jumper clip is presented that is capable of providing series battery connection between adjacent batteries in a battery stack useful for an uninterruptible power supply. The battery terminal jumper clip accommodates tab type terminal connectors and utilizes a single piece unitary construction. Once inserted to provide series coupling between adjacent batteries, the battery terminal jumper clip prevents inadvertent removal by providing a snap-on locking surface for the tab terminal connectors. Lateral removal is also inhibited via axial retention surfaces on either side of the battery terminal jumper clip. A bus surface provides a current path between adjacent tab connectors in the series coupling, and mechanical connection is insured through the provision of at least tab retention clip.

Abstract: A battery cell 10 is attached in an apparatus loaded in a revolving body, etc., such that the negative electrode 2 side of the battery cell 10 is oriented, within a prescribed angular range, in the direction in which centrifugal force acts.

Abstract: A storage battery includes a housing, a groove portion formed on one end surface of the housing, a pair of electrode terminals formed on one end surface of the groove portion, and an engaging concave portion formed in the vicinity of the other end surface on the upper surface of the housing. A battery housing portion includes a housing concave portion capable of housing the storage battery, a pair of connection terminals formed on one inner wall of the housing concave portion to be connected to the electrode terminals of the storage battery, a convex portion formed in a protruded manner at a position corresponding to the groove portion on the one inner wall, and an engaging protrusion portion formed in a protruded manner at a position corresponding to the engaging concave portion on the other inner wall of the housing concave portion.

Abstract: A modular electric storage battery is adaptable to a variety of applications, and for example, as a starting, lighting and ignition (SLI) battery of a car, truck, motorcycle, lawn and garden equipment or other internal combustion engine powered product. The modular battery is constructed from a plurality of battery cells assembled into a battery housing. The cells are sealed, maintenance-free, rechargeable cells. The housing includes quick connect termination, and the starting application is adapted with a base unit having complementary termination. The modular battery and base unit also include aligning features to ensure proper interconnection of the battery terminals. The base unit may be adapted to receive several sizes of modular battery. In addition, a second modular battery, that may be configured as a flashlight or other device, is provided and can inter-connected with the base unit to provide a jump starting capability.

Abstract: A fuel cell stack may be enclosed within a plastic membrane. In one embodiment of the invention, a stack may be enclosed within a heat shrinkable membrane and the membrane caused to shrink about the stack. In this way, any leakage of fluids from the stack may be prevented or retarded by the membrane. A variety of different membranes may be utilized including composite membranes made up of barrier film and heat shrinkable puncture resistant film or bubble wrap covered by shrink wrap film. Any openings formed in the enclosure may be closed using plastic tape or heat sealing techniques. A leak detector may be provided within the enclosure for detecting leaks including gas leaks from within the stack.

Abstract: Provided is a active material for positive electrode for an alkaline secondary cell, which advantageously exhibits improved overdischarge characteristics, improved utilization of the active material and an improved effect of suppressing the rise in cell internal pressure, a method for producing the same, and an alkaline secondary cell using the above active material for positive electrode, especially a nickel-hydrogen secondary cell.

Abstract: A device providing reverse polarization protection for a battery having both positive and negative terminals disposed at one end of the battery (e.g., a 9 volt “transistor radio” battery). The device is adapted for insertion between the battery terminals and the spring contacts in a battery housing. The device is made from an electrically insulating material (e.g., plastic), and has at least two openings of unequal size defined through it. The first opening has a diameter larger than that of a negative terminal of the battery, while the second opening has a diameter larger than that of a positive terminal of the battery. The second opening is sized such that the negative terminal of the battery cannot pass through it, thus providing the required mechanical interference for reverse polarity protection. The thickness of the device is less than the height of the battery terminals.

Abstract: A battery is provided with a battery body and a single input-output terminal fixed thereto which has a positive terminal and a negative terminal electrically insulated from each other. Because of such a structure of the battery, it can be easily connected to an electric appliance using the battery.

Abstract: A modular electric storage battery is adaptable to a variety of applications, and for example, as a starting, lighting and ignition (SLI) battery of a car, truck, motorcycle, lawn and garden equipment or other internal combustion engine powered product. The modular battery is constructed from a plurality of battery cells assembled into a battery housing. The cells are sealed, maintenance-free, rechargeable cells. The housing includes quick connect termination, and the starting application is adapted with a base unit having complementary termination. The modular battery and base unit also include aligning features to ensure proper interconnection of the battery terminals. The base unit may be adapted to receive several sizes of modular battery. In addition, a second modular battery, that may be configured as a flashlight or other device, is provided and can inter-connected with the base unit to provide a jump starting capability.

Abstract: A rechargeable battery pack for portable electronic devices such as a portable video camera possesses improved durability and longevity. The rechargeable battery pack includes an insulated housing; at least one rechargeable battery permanently encased in the housing; and terminal means adapted to electrically engage the portable electronic device. The terminal means includes open-ended anode and cathode pin terminals formed within opposed corner sections of the housing. Each pin terminal includes an open-ended metal contact arranged within the pin terminal in electrical contact with the rechargeable battery means. Each pin terminal has a relatively smaller diameter or cross-sectional area than a relatively larger diameter or cross-sectional area of a complementary terminal pin of an electronic device adapted to be inserted into the pin terminal.

Abstract: A protection device and a method for protecting an electrical component. The protection device has a protective housing and a terminal cap. The protective housing has a base with a contact hole therethrough for receiving an electrical terminal pin, and has a projecting shoulder extending from the base to a first distance from the base. The protective housing also has a retaining clip extending from the base to a second distance from the base, the second distance being greater than the first distance. The terminal cap has a first side and a second side, and in use, at least part of the first side of the terminal cap contacts the projecting shoulder and at least part of the second side of the terminal cap contacts the retaining clip. A method according to the present invention includes steps for assembling a battery and an electrical component housed within the protection device described above.

Abstract: An electronic disconnect circuit protects an electronic device, such as a radio, installed in a motor vehicle from overvoltage condition in which the normal internal protection is inadequate. A normally closed relay includes 2 sets of terminals connected in the ground conductor and in the voltage conductor of the power cable connected to the electronic device. The relay coil is connected through a diode which becomes conductive if the voltage in the ground conductor rises above the voltage in the other conductor, thus protecting the radio or similar electronic device from a reversal of polarity as would occur when a battery charger or similar device is improperly connected to the vehicle. A switching transistor responds to an over voltage condition to turn on the relay coil when an over voltage condition occurs, such as during a high voltage jump start or a high voltage transient condition.

Abstract: A battery contact and holding apparatus (10, 200) includes a door (12, 212) and a battery compartment 14, 214) associated with the door. The door selectively provides access to the interior (16, 216) of the battery compartment. The apparatus also includes a plurality of contacts (86,88,286,288) for electrically coupling to a battery (64, 264) in the battery compartment and a post locator (56, 256) associated with the battery compartment for aligning one or more posts (62,66, 262,266) of a battery with one or more of the plurality of contacts and for disallowing the door to close off the interior of the battery compartment if a battery is not properly placed.

Abstract: A cylindrical cell is disclosed which is so constructed that an insulating ring is seated on the outside of the sealed part of the opening part of a cell case, the terminal face of a negative electrode plate is depressed below the outer face of a facing label covering the insulating ring, and a gas discharge hole formed in the negative electrode plate is concealed with the insulating ring. This construction prevents the cell from allowing flow of a current to an adjacent cell and consequently from being charged by the adjacent cell. Since the cell uses a thermally shrinkable insulating facing member, it enjoys improved reliability of the outer covering.

Abstract: The battery pack which can be attached independent of its orientation houses rechargeable batteries within a case and has positive and negative (+ -) charge-discharge terminals at one end of the case. The charge-discharge terminals are arranged to connect to electrical apparatus without regard to the orientation of the front or back sides of the case. The + - charge-discharge terminals are sheet metal bent in flat-sided c-shapes, and comprise a parallel charge-discharge terminal piece which attaches to the case parallel to the case opening plane and a perpendicular charge-discharge terminal piece which attaches to the case perpendicular to the parallel charge-discharge terminal piece. The parallel charge-discharge terminal piece attaches by fitting into an attachment section formed as a single piece in the case opening.

Abstract: An apparatus comprising an electrical device having a first connection terminal, a second connection terminal and a holder for holding a voltage source having two voltage-source terminals. The holder has a first contact, a second contact and a third contact for cooperation with the voltage-source terminals. Via these contacts the first connection terminal is connectable to one voltage-source terminal and the second connection terminal is connectable to the other voltage-source terminal. The holder is adapted to allow the first contact, the second contact and the third contact to engage simultaneously with the voltage-source terminals. When the voltage source is present the first contact and one of the two other contacts are in engagement with one of the voltage-source terminals, and the other contact, which is not in engagement with the first voltage-source terminal, is in engagement with the second voltage-source terminal.

Abstract: A battery container for use with battery packs of different types having two terminals on one side, comprising a casing for accommodating at least one battery pack; the container has on its outer side two screw terminals for power take-off, and on its inner side two associated contacts electrically connected to the terminals, which contacts are arranged for electrical connection with the respective terminals of one or more battery packs when placed inside the casing in any one of at least two possible orientations.

Abstract: A battery holder incorporated in an electrical device is provided which includes a housing for holding a battery which supplies a voltage to electrical circuits of the device. The battery holder contains positive and negative side contacts fixed to the housing for connecting positive and negative electrodes of the battery to supply a voltage to electrical loads. The positive side contact includes a back plate fixed to the housing, a conductive contact plate for contacting the positive electrode of the battery, the contact plate forming a U-shaped or V-shaped spring together with the back plate, and at least two protective plates of an insulation material arranged along the outer periphery of the contact plate and protruding from it. The distance between the protective plate is defined to be larger than the diameter of the positive electrode of the battery and smaller than the diameter of the battery itself.

Abstract: The present invention relates to an improved rechargeable battery device, particularly an improvement over the structure of the positive and negative terminals of a rechargeable battery, and of some parts of a charging device therefor. By adding a convex ring round the conventional terrace-shaped positive terminal of a rechargeable battery, which ring, formed integrally with said positive terminal, is for an elastic contactor from a charger to contact; and by forming an insulated central concave in the negative terminal to replace the conventional planar negative terminal, it is possible to avoid explosions caused by charging a non-rechargeable battery. Moreover, due to the above-said improvement, mixed use of rechargeable and non-rechargeable batteries is also made possible.

Abstract: In accordance with this invention, a novel stick-on peel-off fastener, comprising one or more conductive sticky elements, sandwiched between one or more terminals of a first object such as an electrical device and one or more terminals of a second object such as battery, can keep the battery affixed to the electrical device while the battery supplies power to the electrical device. One embodiment of a conductive sticky element includes a layer of conductive adhesive, such as a polymer resin that has a number of microscopic silver filings. Another embodiment of a conductive sticky element includes a number of hooks, such as those in Velcro.TM. elements. Yet another embodiment of a conductive sticky element includes a magnet that when used with another magnet, prevents improper coupling of the two objects due to magnetic repulsion.

Abstract: Disclosed is a battery socket comprising an anode plate which is formed with a conductive plate, an insulator mounted between the anode plate and a cathode plate to prevent a short between the pole plates, which has a groove allowing a positive pole of the battery to pass through, and a cathode plate which is formed with a conductive plate and has a groove allowing the protruding portion (positive pole) to pass through and of which one side is contacted with the insulator and the other side is contacted with a flat portion (negative pole) of the battery. The cathode plate has a projecting plate for allowing easy contact with the flat portion (negative pole) of the battery. The anode plate has elastic members or a curve for relaxing the pressure when inserting the positive pole of the battery.

Abstract: A method and apparatus to detect the imminent removal of the battery from a portable electronic device and to automatically shut off said device before electrical power from the battery is lost.

Abstract: An electronic device (100) coupled to a power source (130) having a positive terminal and a negative terminal includes a positive connector (150) for coupling to the positive terminal of the power source (130) and a negative connector (160) for coupling to the negative terminal of the power source (130). An alert circuit (135) coupled to the positive and negative connectors (150, 160) indicates when the power source (130) has been coupled to the electronic device (100) improperly.

Abstract: A rechargeable battery pack which includes several battery cells. Each cell has a positive electrode and a negative electrode connected in series. Each of the battery cells further includes a reverse polarity protection device. The protection device includes a low voltage switch connected between the positive electrode and the negative electrode of the battery cell. The low voltage switch is switched on to become a short circuit when a voltage difference between the positive electrode and the negative electrode for each of the battery cells is lower than a threshold switch-on voltage such that the each of the battery cells is bypassed and protected by conducting a current through the short circuit in the low voltage switch.

Abstract: A number of embodiments of electric power assisted bicycles including a battery case arrangement that is comprised of inner and outer cases with the inner case receiving the batteries. In this way, the batteries are protected from the elements and yet can be conveniently and easily detached and carried to a remote location for charging.

Abstract: A battery chamber has a battery storage portion for storing an elongated battery, a battery contact spring member which is disposed at one end of the battery storage portion to contact the electrode of the battery, and first and second press-down members which are disposed at least at one side of the battery storage portion to extend toward the battery side and to press down and hold the outer surface of the battery, and are separated by a predetermined interval, so that the first press-down member is located at the battery contact spring member side. The second press-down member is formed with a slanted portion at an edge on the first press-down member side.

Abstract: A battery receptacle has first and second types of electrical contacts received in guide slots formed in facing end wall surfaces of a housing. The first type of electrical contact has a inwardly facing protrusion extending inwardly of the compartment a distance sufficient to be engaged by the positive electrical contact of a battery but less than the distance required to make contact with the negative electrical contact of the battery. The second type of electrical contact is a tapered spring contact with the wide end positioned inwardly of the receptacle, the diameter of the wide end being larger than the diameter of the positive contact of a battery. With batteries correctly installed, the first type of contact engages the positive contact of the battery and the second type of contact engages the negative contact of the battery. In any other configuration, at least one of the electrical contacts is not engaged with a battery contact.

Abstract: In accordance with this invention, a novel stick-on peel-off fastener, comprising one or more conductive sticky elements, sandwiched between one or more terminals of a first object such as an electrical device and one or more terminals of a second object such as battery, can keep the battery affixed to the electrical device while the battery supplies power to the electrical device. One embodiment of a conductive sticky element includes a layer of conductive adhesive, such as a polymer resin that has a number of microscopic silver filings. Another embodiment of a conductive sticky element includes a number of hooks, such as those in Velcro.TM. elements. Yet another embodiment of a conductive sticky element includes a magnet that when used with another magnet, prevents improper coupling of the two objects due to magnetic repulsion.

Abstract: A bi-polar solid state battery switch is provided enabling the DC pulse output of battery reclaimer and charger circuits to be connected to a battery without regard to battery terminal polarity. The battery polarity bias itself determines bias to an conductive state of one of two sets of transistors through the respective resistors, This makes the battery connection conform to the same polarity as the output DC of the reclaimer and charger.