Abstract: A pronounced heat-diffusing action for a battery pack, which has a plurality of battery cells (2) located in a housing (1), is created by shaping the wall of the housing (1) surrounding the battery cells (2) such that this wall forms at least one duct (3, 4) for a heat-diffusing medium, which duct is closed off from the interior of the housing (1).

Abstract: In the battery pack, a battery holder accommodates a plurality of cylindrical batteries disposed in a matrix or offset arrangement in a mutually parallel posture. The battery holder includes a holder main body and an end plate respectively connected to opposite ends of the holder main body having a plurality of opposed walls disposed in a mutually parallel posture inside peripheral walls, and also having a storage portion accommodating the cylindrical batteries between the opposed walls. The opposed wall is provided, on its opposite faces, with a protrusion projecting toward the swale between the adjacent cylindrical batteries to constitute a thick portion defining a through-hole extending through in the longitudinal direction of the cylindrical battery. A connection rod is inserted in the through-hole defined in the above-mentioned thick portion, and the end plate is secured to the opposite ends of the holder main body by means of the connection rod.

Abstract: A portable electronic device (100) includes a main body (10), a cover (20), and a battery (30). The cover has at least one claw (252), and the cover is mounted to the main body by the at least one claw. The battery has at least one protrusion (35). Each protrusion is configured for engaging with a corresponding claw in such a manner that when the battery is positioned in a “tool” mode (i.e., as opposed to a “use”/battery-power mode) is pressed towards the cover, a given protrusion pushes a respective claw away from the main body to allow the cover to be separated from the main body.

Abstract: A battery pack that can prevent deformation caused by external impact as well as leakage of an electrolyte. The battery pack includes a bare cell including a pouch type casing, an electrode assembly accommodated in the pouch type casing, and positive and negative electrode tabs extending from one side of the pouch type casing, a protection circuit board electrically connected to the bare cell, and a main body accommodating the bare cell and the protection circuit board. The battery pack also includes at least one reinforcing plate, wherein ends of the reinforcing plate are in contact with a surface of a front end portion of the bare cell or an inner surface of the main body. The reinforcing plate can be formed integrally with an upper or lower case of the main body or can be formed separately and disposed in the upper case or lower case.

Abstract: A battery housing unit with a releasable cover for minimizing mis-alignment of a battery housed therein during high impact loads. The battery unit includes a battery holder having retention members biased towards one another that receive a battery. The retention members engage stop ribs projecting from the cover. The cover fits over the retention members of the battery holder and to a base of the housing unit. The retention members and stop ribs are engaged when high impact loads are delivered to the housing unit and the battery is urged against the biasing nature of the retention members. Movement and mis-alignment of the battery is thus minimized and high impact loads are re-distributed throughout the cover. Detents may be provided on each retention member for engaging a corresponding cavity provided on each stop rib. The detents and cavities interlock the retention members and stop ribs together upon high impact. In this manner, movement and mis-alignment of the battery is also minimized.

Abstract: A tool system with a battery pack and a device that is configured to be selectively coupled to the battery pack. The battery pack has first, second and third pack terminals. The device has a battery mount with a body that defines a well and first and second device terminals. The body defines a well into which the battery pack is removably received. The first and second device terminals extend outwardly from a proximal portion of the battery mount and engage the first and second pack terminals when the battery pack is fully inserted into the well. At least one of the first and second pack terminals and the first and second device terminals is a male terminal that is received into a corresponding one of the first and second pack terminals and the first and second device terminals. A longitudinal axis of each of the first, second and third pack terminals is arranged parallel to a longitudinal axis of the battery pack.

Abstract: A battery cover assembly (100) includes a battery cover (30), a resilient member (20), and a locking member (40). The battery cover has a latching member configured for engaging with the fastener mechanism of a housing (10), and an insertion hole (322) configured for the insertion of a latching post (120) of the housing. The resilient member is mounted on the battery cover, and has a first latching end (202) and a second latching end (204). The first latching end is secured on the battery cover. The locking member is rotatably attached on the battery cover and configured for resisting the latching post when the battery cover is in the closed position thereby preventing movement of the battery cover toward the opened position. The second latching end of the resilient member is fixed on the locking member.

Abstract: A locking mechanism includes at least one spring loaded locking member, a lock release device operatively coupled to the spring loaded locking member, and at least one latching member. The latching member is securely gripped by the spring loaded locking member when the lock release device is in partial frictional contact with the spring loaded locking member under the spring bias of the spring loaded locking member. The latching member is released from the grip of the spring loaded locking member when the lock release device is forced in frictional sliding contact with the spring loaded locking member against the spring bias of the spring loaded locking member.

Abstract: A locking apparatus for a battery (10) having locking portions (11) includes a base (20), a resilient member (85) secured to the base, and a first lock member (40). The resilient member includes a stop portion (86). The first lock member defines a first recess (43) and a second recess (42), and includes at least one post (51). The at least one post is engaged in the locking portions of the battery. The first lock member is slidable between a first position and a second position. When the first lock member is slid to the first position, the stop potion of the resilient member abuts the first lock member in the first recess to secure the battery to the base. When the first lock member is slid to the second position, the stop potion abuts the first lock member in the second recess to release the battery from the base.

Abstract: A battery compartment arrangement for remote control blind with remote control drive mountable at a mounting end of a headrail of the blind, the remote control drive comprises a case comprising a slit at one end for retaining an inserted portion of a front surface of the headrail, and a plate for dividing an internal space into a first compartment for receiving a motor and a second compartment, the second compartment including a cavity at its one outer end and a notch at its the other outer end; and a battery compartment received in and secured to the second compartment by snapping its pin and latch at both ends into the cavity and the notch respectively. Unfastening the pin and the latch will facilitate a replacement of at least one consumed cell.

Abstract: A battery powered device comprising a housing having a battery compartment apparatus disposed therein, with the battery compartment apparatus being configured to accept at least one battery. The battery compartment apparatus comprises a battery carrier and a locking hold down mechanism. The carrier is slidably mounted in the housing. The locking hold down mechanism responds to insertion and withdrawal of the carrier into and out of the housing by locking the locking hold down mechanism against the battery, thereby preventing undesired displacement of the battery within the housing.

Abstract: A battery cover assembly (100) includes a housing (30), fixing assembly (40), cover (10) and button (20). The housing includes a receptacle (33) in a middle portion thereof; and two latch slots (37) defined in a bottom portion thereof The base board (50) is fixed to the housing, and with the housing defines a receiving cavity. The fixing assembly includes a sliding frame (41), slidably attached on the base board, and an elastic member (44). The sliding frame has a multiple clasps (423, 432). The cover is configured to be removable attached to the housing and defines a button slot (11) therein. The cover has a multiple claws (12, 13) and two latches (14). The button is mounted to the housing and cooperates with the sliding frame, the button extending through the button slot so as to be exposed to a user.

Abstract: A liquid absorbing sheet has a liquid-absorbing resin layer that can effectively absorb the nonaqueous electrolyte solution used in nonaqueous electrolyte secondary cells that make nonaqueous electrolyte battery packs (in particular, lithium ion-based nonaqueous secondary battery packs). The liquid-absorbing resin layer is obtained by irradiating a particular monomer composition with UV rays or other energy rays to polymerize the monomer composition. The monomer composition contains a monofunctional monomer component (A) having a polyethylene glycol acrylate monomer and an amide bond-containing acrylic monomer; and a polyfunctional monomer component (B).

Abstract: An electronic equipment, comprising: a battery receiving chamber for receiving a battery, a battery lid arranged to be rotatable to open and close an opening portion of the battery receiving chamber, a locking member arranged to engage with the battery receiving chamber to lock the battery lid so that the opening portion of the battery receiving chamber is closed, a contact terminal connectable to a terminal of the battery received in the battery receiving chamber, the contact terminal being arranged to be build in the battery lid movably in a thickness direction of the battery lid, wherein the contact terminal is arranged to protrude into the inside of the battery lid in accordance with the locking member engaging with the battery receiving chamber with the battery lid is closed and the contact terminal is retracted into the battery lid in accordance with the locking member being released from engagement with the battery receiving chamber.

Abstract: Battery packs are retained by frames which are comprised of plastic beams and aluminum corner connectors that peripherally surround the battery packs. The plastic beams are tensioned by tensioning bolts which pass through the aluminum corner connectors and thread into threaded pin inserts laterally seated in the beams. As the tensioning bolts are advanced into the inserts the beams are axially tensioned. Damping pads are disposed between the separate battery modules of the battery packs, as well as at the corners of the frames, to both absorb vibrational and spike impacts. The damping pads frictionally engage the outer surfaces of the battery cases so that the batteries will not move in the Z-axis direction.

Abstract: A flexible tongue having guide tabs is used in a battery capturing mechanism to engage alignment grooves formed in a battery cartridge. The guide tabs form hooks so that when the battery has been inserted, thereby causing the tongues to deflect at a flexible hinge as the battery slides into the capturing mechanism, the hooks retain the battery. Preferably tapered guide rails are aligned with the tabs and are formed on a rigid floor to which the tongue's flexible hinge attaches, thereby guiding a connector of the battery into electrical engagement with a corresponding connector that is part of the device into which the battery capturing mechanism is used. To remove the battery, the tongue may be depressed and battery grips grasped to retrieve the battery from the mechanism.

Abstract: A method and apparatus for enabling the use of a non-sterile battery with a sterile surgical instrument. The sterile transfer container has a tubular body with a closed distal end and an open proximal end. The container is provided with a cover and a locking mechanism for locking the cover to the body. The container is adapted to be attached to a surgical instrument in such a way that the latch assembly is prevented from opening until the container is removed from the instrument.

Abstract: A battery pack that electrically connects a terminal cover, which is attached to a terminal base, and a battery pack case even if the terminal cover and case are not in direct contact with each other. The case is formed from a conductive material and accommodates a battery. The terminal base is formed from a non-conductive material and attached to the case. The terminal cover is formed from a conductive material and attached to the terminal base. A conductor formed from a conductive material comes in contact with both of the terminal cover and the case.

Abstract: A method and apparatus for deactivating a bad battery cell from a battery pack for an energy storage system of an electric vehicle is disclosed. The apparatus and methodology includes a clamshell member arranged at an end of the cells and a printed circuit board arranged adjacent to the clamshell member. A collector plate is arranged adjacent to the printed circuit board and a switch is arranged on the printed circuit board. A wire bond is arranged between the switch and one of the cells and a second wire bond is arranged between the switch and the collector plate. The plurality of switches will allow for the identification of the one individual cell having a weak short circuit within the battery pack. Upon identification of the cell with the weak short circuit that cell will have its switch placed in an open position thus electrically isolating the faulty or bad cell from the battery pack.

Abstract: A battery cartridge has a casing adapted to releasably hold at least one battery, externally accessible contacts on the casing, and internal circuitry in the casing between the contacts and poles of the battery. A switch is mounted in the casing and connected to the circuitry between one of the poles and the respective contacts for controlling current flow therebetween.

Abstract: Disclosed is a battery pack locking device for a portable wireless terminal which is configured to utilize a locking method in which support protrusions formed at one end of a battery pack are engaged with support grooves formed at the terminal body of the portable wireless terminal, and the battery pack is then brought into close contact with the seat surface of the terminal body, while using a button member adapted to perform a depressing operation, thereby achieving an easy separation of the battery pack from the portable wireless terminal. In accordance with the configuration, it is possible to prevent the fingernail of the user from being damaged during the attachment or detachment procedure of the battery pack. In particular, it is unnecessary to provide an additional space for allowing a horizontal movement of the locking device. Accordingly, there is an increased flexibility in the design of the terminal appearance.

Abstract: Vehicles, such as all terrain vehicles, can be provided with a battery box. The battery box comprises a bottom wall, a top wall, a first side wall, and a second side wall which together define a battery retention chamber having a front opening configured for passage of a battery. Vehicles having a battery box are also provided.

Abstract: The apparatus has a carrier for accommodating a plurality of series-connected energy cells, which each have a positive terminal and a negative terminal. An electrical contact is provided in the carrier for each terminal, which electrical contacts, when the energy cell is inserted, connect said energy cell to connection points for drawing energy. Each positive terminal and in each case the associated negative terminal are electrically connected to one another via a switch. These switches are designed such that they are in each case interrupted when an energy cell is inserted. The invention then also makes possible current consumption if fewer than the maximum possible number of energy cells are available.

Abstract: A latching assembly for securing a battery package (12) to a portable communication device. The latching assembly includes a pair of opposed moveable latches (10), each latch (10) being located toward a side of the battery package, and a biasing member or members (13) arranged to bias the latches (10) away from each other to engage with respective catches on the portable communication device to thereby secure the battery package (12) to the portable communication device. User contacts (15) are also provided and these are operable to cause the latches (10) to move toward each other to disengage from their respective catches to enable the battery package (12) to be removed from the portable communication device.

Abstract: A battery system for a vehicle includes a battery module having a plurality of cells electrically coupled together and a first conductive element for electrically coupling the battery module to other elements in the battery system. The battery system also has a base configured for securing the battery module in place in the vehicle. The base includes a second conductive element for electrically coupling the base to the first conductive element, and a rotatable arm for securing the battery module in place relative to the base. The first conductive element is configured to contact the second conductive element when the rotatable arm is positioned to secure the battery module in place relative to the base.

Abstract: A battery cover assembly mechanism (200) of a portable electronic device (100) includes a housing (10), a battery cover (20), and an elastic member (30) mounted on the housing. The housing has at least one latching portion (126). The battery cover includes at least one latching block (28), a first stopper (24), and a second stopper (26). The elastic member includes a first elastic portion (34) and a second elastic portion (36). In assembly, the latching block of the battery cover is engaged with the latching portion of the housing, and the first stopper and the second stopper respectively engage with the first elastic portion and the second elastic portion. Therefore, the battery cover is stably attached to the housing.

Abstract: Secondary battery structure 100 has secondary batteries 110 equipped with metallic battery cases 111 , temperature detectors 120 for detecting temperature of the secondary batteries 110 , and supporting members 130 for supporting the temperature detectors 120 . Each of the temperature detectors 120 has a detector body 121 which detects surface temperature of the battery case 111 by contacting with a bottom surface 111c (temperature-detected surface) on the battery case 111, and a fixing portion 122 which engages with the supporting member 130 and fixes the temperature detector 120 to the secondary battery 110 while keeping the detector body 121 contact with the bottom surface 111c on the battery case 111.

Abstract: The invention relates to a rechargeable battery pack, in particular for an electrical hand tool device, comprising at least two series-connected rechargeable battery cells (20) and/or rechargeable batter cell blocks and an electronics unit having a printed circuit board (14), wherein sheet metal conductors (16) for electrically connecting the series-connected rechargeable battery cells (20) and/or rechargeable battery cell blocks are provided, wherein the sheet metal conductors (16) are connected directly to the printed circuit board (14).

Abstract: The invention relates to a device for locking electric appliances (2) with battery packs (4) for power supply, whereby the electric appliances (2) comprise a displaceable bolt (14; 36; 38; 40; 42) and the battery packs (4) comprise at least two recesses (24, 26) and the recesses (24, 26) are arranged serially behind each other in the direction of a relative movement of the electric appliance (2) and battery pack (4) and, after locking, the bolt (14; 36; 38; 40; 42) engages in one of the recesses (24, 26).

Abstract: A thermally managed enclosure for batteries in a motor vehicle or other machinery includes a cradle of thermally conductive material for containing a battery. The cradle having a bottom wall and side walls closely fitted to and in contact with the battery, to maintain the battery in a stable position. The bottom wall of the cradle has a passageway trough containing a tube for flowing heating or cooling fluid therethrough, to control the optimal operating temperature of the battery. The passageway trough is preferably filled with a thermally conductive fill surrounding said tube. When two or more batteries are required, an array of adjacent cradles are provided in a monocoque tray formed by bonding or welding the multiple cradles at their adjacent sides.

Abstract: A process of controlling the temperature of a battery pack includes the steps of determining the operating mode and present temperature of the battery pack. Optimal temperature for the battery pack depends on the operating mode and the difference between the present temperature and the previously identified optimal temperature. The battery pack is warmed if the temperature difference (measured minus optimal) is large. The optimal time interval over which the battery pack should be warmed is a function of the operating mode and the previously calculated temperature difference. A heater is switchably operated enabling and disabling the heat generating element to warm the pack to the previously identified optimal temperature.

Abstract: A battery cover assembly includes a battery cover (10), a moveable member (12), an elastic apparatus (13) and a housing (14). The battery cover defines a button hole (101), and a locking portion (104) is disposed in one side of the battery cover. The moveable member includes a main beam (121) and at least one arm (124). The main beam includes a button (122) received in the button hole. The moveable member is slidably attached to the battery cover. The elastic apparatus includes at least one concave portion (1321). The concave portion includes a clasp (1324) and defines a latching hole (1326). The locking portion engages in the latching hole. The concave portion resists the arm of the moveable member. The housing defines a latching hole (145). The clasp of the elastic apparatus detachably engages in the hole of the housing. This provides a user with convenient disassembling operation.

Abstract: Disclosed is a power generation system including an attachment part to attach a fuel container which stores a fuel, a lock mechanism to detect a lock or a lock release of the fuel container which is attached to the attachment part and a data recording unit to record a data in a storage medium provided at the fuel container based on a detection of the lock release by the lock mechanism before the fuel container is detached from the attachment part.

Abstract: Systems and methods are disclosed for removing a power supply from a host unit running a computer program, without losing data or causing a cold boot. The present invention employs a retaining assembly for the power supply that delays removal of the power supply until shutting down of the computer program of the host unit. The system may further comprise a logic unit that estimates the period from initiating a power off for the unit, up to an actual shut down of the computer program.

Abstract: A battery module fixture applicable to a battery module having a first positioning portion is disclosed. The battery module fixture includes a base and a spring member. The base includes a second positioning portion having a first end for engaging with the first positioning portion, and a second end connected to the first end capable of being fixed to the first positioning portion. The spring member is capable of being fixed to the base, and includes a third positioning portion corresponding to the first end of the second positioning portion of the base, and a actuating portion for moving along with the third positioning portion, so as to break the third positioning portion away from the first end.

Abstract: An electric power tool includes a main body having a drive portion with a motor, an output portion for holding a tool, and a battery pack attachment portion, and a battery pack attached to the battery pack attachment portion by means of an attaching and detaching mechanism. The battery pack supplies electric power to the drive portion to operate the output portion. The attaching and detaching mechanism has a releasing unit for releasing the battery pack from the main body by operating plural types of release operation portions in their entirety.

Abstract: A battery holder (210) for mounting a button-type battery (200) on a printed circuit board (220) is provided. The battery holder comprises a resilient electrode plate (212), a ring (214) and a battery cap (216). The resilient electrode plate is soldered to positive contacts (222) of the printed circuit board. A positive electrode of the battery is put on and electrically connects with the resilient electrode plate to thereby connect electrically with the positive contacts on the printed circuit board. The ring is soldered to negative contacts (224) of the printed circuit board and surrounds the resilient electrode plate. The battery is accommodated within the ring. The battery cap is fixed and electrically connected to the ring and covers the battery. The battery cap also electrically contacts with a negative electrode (202) on a top of the battery. The negative electrode and positive electrode of the battery are separated by an insulation (206).

Abstract: The battery apparatus according to the present invention has the structure in which a lid is engaged with a battery storage to cover a storage portion storing a battery unit via a first fixing means employing a simple structure. Further, the battery storage is formed of the frame and a closing unit engaged via a second fixing means only employing a simple structure. Furthermore, since the battery storage, or the lid, or the closing unit is formed of metal; and the thickness thereof is made thinner, the capacity of the storage portion can be increased to the extent of the reduction in the thickness, whereby the amount of electricity can be increased.

Abstract: A portable electronic device housing (100) is provided that can include a first molding (110) defining a battery compartment (120) and an internal cavity (130) and a second molding (140) disposed on the periphery of the first molding (110) and forming at least a portion of an outer surface (200) of the housing (100) and a biasing protrusion base (150) in the internal cavity (130). Additionally, a void (180) in the first molding (110) can be located at a side of the internal cavity (130) opposite to the battery compartment (120) where the void (180) provides an unsupported surface of the base (150). Still further, a battery biasing protrusion (160) unitary with the second molding (140) can be provided where the battery biasing protrusion (160) protrudes from the base (150) towards the battery compartment (120).

Abstract: A battery holding structure for an electronic device is provided, which includes a battery chamber having an opening, a fixing member and a cover. The fixing member has a cantilever extending from the battery chamber to the opening. The cantilever has a pressing portion at the opening, and the cover has a pushing portion corresponding to the pressing portion. When the cover covers the opening, the pushing portion presses against the pressing portion and fixes the battery installed in the battery chamber.

Abstract: A cover latching assembly (60) for a portable electronic device (100) is provided. The portable electronic device includes a housing (10) and a cover (20) configured for attaching to the housing. The cover has a latching portion (26) formed thereon. The cover latching assembly includes a button (30) and an elastic member (40). The button includes a recessed portion (344), and the button is slidably secured on the housing. The elastic member enables the latching portion of the cover to engage with the recessed portion of the button.

Abstract: A cordless power tool has a housing which includes a mechanism to couple with a removable battery pack. The battery pack includes one or more battery cells as well as a vent system in the battery pack housing which enables fluid to move through the housing. A mechanism is associated with the battery pack to dissipate heat from the battery pack.

Abstract: A battery assembly comprises a battery and a housing adapted for use in an environment often exposed to water. The housing preferably has recessed portions spaced far apart at the top end thereof, with electrical terminals disposed in the recessed portions. The recessed portions are configured to securely receive corresponding downward-facing compartments disposed at the top of the battery, wherein the compartments have recessed openings housing electrical terminals. Accordingly, the electrical terminals of the housing are configured to contact the electrical terminals of the battery when the battery's compartments are disposed in the housing's recessed portions, forming a substantially watertight seal.

Abstract: A battery cover assembly mechanism (200) of a portable electronic device (100) includes a housing (10), a battery cover (20), and an elastic member (30) mounted on the housing. The housing has at least one latching portion (126). The battery cover includes at least one latching block (28), a first stopper (24), and a second stopper (26). The elastic member includes a first elastic portion (34) and a second elastic portion (36). In assembly, the latching block of the battery cover is engaged with the latching portion of the housing, and the first stopper and the second stopper respectively engage with the first elastic portion and the second elastic portion. Therefore, the battery cover is stably attached to the housing.

Abstract: Disclosed is a removable battery pack for use with a vacuum cleaner, for use with a recharging station. The battery pack is used to power a vacuum, and when discharged can be removed and replaced with another charged battery pack.

Abstract: A battery cover fixing mechanism is provided for coupling a cover (1) to a housing (2) of a portable electronic device. The battery cover fixing mechanism includes a blocking mechanism, an opening (16), a latching mechanism, a slot (20) and a cutout (24). The cover forms the blocking mechanism and defines the opening. The housing defines the slot and the cutout. The latching mechanism includes a block (30), an elastic member (32), a slider (34) having a blocking part, and a holder (36) fixed to the housing. The slider is slidably attached on the holder. The block is fixed on the slider and extends through the cutout and the opening. The blocking mechanism of the cover engages in the slot of the housing and with the blocking part of the slider. Two ends of the elastic member are respectively attached to the holder and the slider.

Abstract: A battery apparatus and electronic equipment, in which the battery apparatus having a characteristic compatible with the electronic equipment can be suitably attached to the electronic equipment, and which are advantageous in miniaturizing themselves and improving their operability. In a battery apparatus (100), an identification section (18) of the battery apparatus (100) serves to identify a characteristic of the battery apparatus (100), and which is provided on an end surface (1022) and on both sides of a battery-side terminal (14) in the width direction (W) of the battery apparatus (100). The identification section (18) is configured with identification recesses (1802), (1804) formed in a manner open to the end surface (1022), and at least one of the positions, cross-sectional shapes, and lengths on the end surface (1022) of the identification recesses (1802), (1804) is formed on the basis of the characteristic of the battery apparatus.

Abstract: A battery-powered apparatus for holding and energizing an electric transducer, includes a hand-held battery housing carrying the transducer mount, and first and second internal battery contacts. A first external battery charge terminal is on the transducer mount, and a second external battery charge terminal is on a part of the battery housing, such as its end cap. A double-throw switch has a common element electrically connected to an internal battery terminal contact, has a first switched contact leading to a first terminal of the electric transducer, and has opposite second switched contact electrically connected to an external battery charge terminal. If there are two electric transducers, they may be a part of a light source comprising a reflector, a first electric lamp having a filament at its focal point, and a second electric lamp extending into that reflector beside the first electric lamp.

Abstract: A cordless drive assembly for driving various orthopedic surgical instruments is described. The drive assembly is battery powered and includes tracks in the handle portion of its housing for receiving the battery. A latch locks the battery to the housing. A combination of a rechargeable, detachable battery system and a power tool. The battery slides onto the power tool through a complementary groove and flange structure.

Abstract: A cordless drive assembly for driving various orthopedic surgical instruments is described. The drive assembly is battery powered and includes tracks in the handle portion of its housing for receiving the battery. A latch locks the battery to the housing. A combination of a rechargeable, detachable battery system and a power tool. The battery slides onto the power tool through a complementary groove and flange structure.