while this invention is susceptible of embodiment in many different forms , there are shown in the drawings , and will be described herein in detail , specific embodiments thereof with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the invention to the specific embodiments illustrated . fig1 illustrates a battery holding device 18 including a frame 20 that holds a plurality of batteries “ b ”. the frame 20 , as well as each of the alternate embodiment frames or modules described herein , is preferably a unitary molded piece . the frame 20 includes a bottom wall 26 sidewalls 28 , 30 and end walls 32 , 34 . a bracket 35 extends from the end wall 34 . the bracket can include an aperture 36 for hanging of the frame 20 . the sidewalls 28 , 30 include an upper row of openings 38 and a lower row of openings 44 . the sidewalls 28 , 30 have outside partial - cylindrical contours that are substantially parallel to the outside contours of the batteries held within the frame 20 . thus , even in a dark environment , a user can , by feel of the outside contour of the frame 20 , ascertain the size of a battery held within the frame . furthermore , the openings , either the upper row 38 or the lower row 44 can be sized sufficiently such that a user &# 39 ; s finger can actually directly feel the outside contour of a battery held within the frame to determine the size of the battery , even in the dark . the batteries held within the frame are exposed through the openings 38 , 44 . furthermore , the bottom wall 26 is recessed adjacent each of the lower row of openings 44 such that a bottom surface “ s ” of a battery held within the frame is exposed to a user &# 39 ; s touch . according to the preferred embodiment illustrated in fig1 , the frame has an overall length “ l ” ( fig1 ), without the bracket 35 , of about 197 mm , an overall height “ h ” ( fig3 a ) of about 54 mm , and an overall width “ w ” ( fig3 a ) of about 35 mm . the frame is preferably injection molded plastic having an average thickness “ th ” ( fig3 a ) of about 2 mm . fig2 illustrates the frame 20 in more detail with the batteries removed . the frame 20 includes compartments or bays for receiving an assortment of batteries . according to the embodiment shown in fig1 and 2 , the frame 20 is substantially mirror image identical across a longitudinal vertical center plane indicated by the centerline 50 and a lateral vertical center plane indicated by the centerline 52 , except for the bracket 35 . in fig2 , an assortment of bays is provided to the right of the lateral centerline 52 . straddling the centerline 52 is a first bay 60 for holding a rectangular 9v battery . adjacent first bay 60 are two rows of three bays for holding cylindrical , size aa batteries . these bays are marked 61 - 66 . adjacent to the bays 63 , 66 is an eighth bay 67 for holding a size c battery . adjacent to the bay 67 are bays 68 , 69 for holding size aaa batteries . the bays to the left of the lateral centerline 52 are mirror image identical . thus , the frame 20 illustrated can hold 19 batteries . the bays 61 - 66 are formed as cylindrical tubes with open top and bottom ends and with portions removed . for example , the bay 65 includes an open top and 65 a and an open bottom end 65 b that is partially closed by the bottom wall 26 . the bay 65 includes a lower sidewall opening 44 a that is about ⅜ inch tall and circumscribes about 90 ° of the circumference of the cylindrical tube . the bay 65 includes an upper sidewall opening 38 a that is about ⅞ inch in height and circumscribes about 180 ° of the cylindrical tube circumference . the remaining bays 61 - 64 and 66 are substantially identical to the bay 65 except that the bays 61 , 64 have upper openings 38 a that circumscribes about 130 ° of the circumference of the cylindrical tube . the bays 61 , 64 form an interior end wall 72 of the first bay 60 . likewise , the mirror image bays on the left side of the lateral centerline 52 form an opposite interior end wall 74 of the first bay 60 . the first bay 60 includes a substantially flat first sidewall 78 and a substantially flat second sidewall 80 . lower substantially rectangular openings 44 b are formed between the sidewalls 78 , 80 and the bottom wall 26 . upper openings 38 b are formed through the sidewall 78 and through the sidewall 80 . the bays 63 , 66 form an interior sidewall 86 and the bays 68 , 69 form an interior sidewall 88 of the bay 67 . a cylinder that forms the bay 67 , with portions removed as described below , blends into the sidewalls 86 , 88 . the cylinder includes an open top end 67 a and an open bottom end 67 b at least partially closed by the bottom wall 26 . the cylinder includes two lower sidewall openings 44 c , one on each side of the centerline 50 , that are approximately ⅜ inch in height and each circumscribes approximately 90 ° of the circumference of the cylinder . the cylinder includes two upper sidewall openings 38 c , one on each side of the centerline 50 , that are approximately ⅞ inch in height and each circumscribes approximately 120 ° of the circumference of the cylinder . the bays 68 , 69 are each formed by a cylinder having portions removed as described below . for example , the bay 69 includes an open top end 69 a and an open bottom end 69 b . a lower opening 44 d is approximately ⅜ inch in height and circumscribes about 180 ° of the circumference of the cylinder . an upper opening 38 d is about ⅝ inch in height and circumscribes approximately 180 ° of the circumference of the cylinder . as shown in fig3 , the bottom wall 26 includes an irregular longitudinal edge 126 that extends along the longitudinal extent of the frame 20 except for the bays 68 , 69 . the edge 126 is recessed from a lateral extent of the bays to form bottom openings to expose the bottom surface “ s ” of the batteries “ b ” held within the bays to a user &# 39 ; s touch to allow the user &# 39 ; s finger to press the batteries from below . the lower sidewall openings 44 a - 44 d of the bays are contiguous with the bottom openings formed by the edge 126 to allow the user &# 39 ; s finger to not only press the bottom surface “ s ” of the batteries but to slide the batteries toward the top open ends of the bays to eject the batteries . the bottom wall provides apertures 128 for the bays 61 - 66 to receive the positive terminal “ t ” of a typical battery “ b ”. the bottom wall also includes an aperture 132 in bay 67 for receiving the terminal of a typical battery . as shown in fig3 a , because of the apertures 128 , a battery can be put into the compartment with the extending terminal either oriented at the top or bottom of the battery . the bays 68 , 69 include a support gusset 136 that supports a bottom wall portion 138 for holding batteries within the bays 68 , 69 . the bottom wall portion 138 includes a partial aperture 142 for receiving a terminal of a typical battery . each of the bays 60 - 69 includes a mechanism for releasably holding a battery within the individual bays . according to the preferred embodiment , the mechanism comprises one or two resilient detents or hooks which overlies or protrudes into the bay near to the otherwise open end of each bay . the detents are resiliently flexible outwardly to allow battery to be removed through the open end of each bay . fig2 illustrates two variations of the detent structures . although two variations are described , in practice , probably one detent structure or the other would be used for all the detent structures . a first variation in shown in fig4 - 5 and a second variation is shown in fig6 - 7 . fig4 shows a sidewall of the bay 62 having a slot opening 139 and a detent 140 formed within that slot opening . the detent 140 , due to the cantilever arrangement , exhibits a resilient flexibility . the detent includes a neck portion 142 and a head portion 144 extending therefrom . the head portion 144 includes a ramp surface 146 which allows the detent 140 to flex outwardly as a battery b ( shown dashed in fig5 ) is forcibly ejected through the top open end of the bay 62 fig6 and 7 illustrate an alternate embodiment for the detent , a detent 160 which is shaped similarly to the detent 140 . however , according to this embodiment the detent is formed within a closed opening 162 in the sidewall of the bay 67 , not a slotted opening . as can be observed in the figures , the smaller bays 61 - 66 and 68 , 69 each include a single detent , while the larger bay 60 , 67 include two detents , that are opposing across a width of the bays 60 , 67 . fig2 a illustrates an alternate embodiment frame 190 wherein each bay includes a top open end 192 and a bottom open end 193 , and at least one central sidewall opening 194 . each bay includes one or two detents 160 ( or 140 ) adjacent the open ends 192 , 193 . a battery can be ejected through either the top open end or the bottom open end . according to this embodiment , the frame 190 is also configured to be mirror image identical across a horizontal plane that contains the centerline 50 , 52 . as an alternate to detents , bumps extending into the compartment from an inside surface of the compartment sidewalls , or ribs , or a soft liner portion within each compartment that is resiliently compressible to grip a battery held therein , or resilient compartment walls , can be used to releasably retain a battery within the frame . fig8 through 12 illustrate additional views of the device 20 for further understanding of the structure . fig1 and 14 illustrate an alternate embodiment device 200 wherein the bay 60 of the previous embodiment is replaced with a box - like container 206 . the box - like container 206 includes substantially solid sidewalls 208 , 210 , 212 , 214 and a solid bottom wall 216 . a film hinge 222 connects a lid 224 to the sidewall 214 . the lid 224 includes a resilient catch 228 which , once the lid is pressed closed onto the container 206 , resiliently engages a groove 232 to hold the lid closed onto the container 206 . the container 206 is conveniently used for holding small items , such as small watch batteries , flashlight bulbs , keys , pills , film , fuses , etc . fig1 also illustrates that the compact arrangement of batteries in the frame 200 , or similarly the first described frame 20 , is such that the frame can be held in a user &# 39 ; s hand 260 ( shown in phantom ), clasped between a user &# 39 ; s thumb 266 and fingers 268 , and resting in a user &# 39 ; s palm , whereas a finger 270 can simultaneously be used to eject a battery “ b ” from a bay , in this example the bay 65 . fig1 and 16 illustrate a further embodiment device 300 , similar to the embodiment 200 described in fig1 and 14 but with a modified container 306 . rather than a film hinge , a rounded pin 308 is formed onto a sidewall 314 of the container 306 . a lid 320 is hingedly engaged to the pin 306 , by c - shaped portions 322 , in snap fit fashion . the lid 320 need not completely cover an open top 326 of the container 306 as shown . such a configuration would allow a user to view into the container 306 , through the areas on opposite sides of the lid 320 , at least to a limited extent . the remaining portions of this container 306 are similar to the container 206 . fig1 illustrates an accessory container 350 that can be used in any of the heretofore described embodiments . the container 350 includes a cylindrical body 354 having an open top 356 and a closed bottom 360 . a lid 362 is connected to the body 354 by a film hinge 366 . as can be readily understood , the lid 362 can be folded over and pressed down around the body 354 to close the open top 356 to form an enclosed container . sidewalls 370 of the lid 362 are sized to the resiliently engaged by the body 354 to hold the lid in the closed configuration . the container 350 is sized and shaped substantially identically to a c size battery . thus , the container 350 can be held in any of the compartments sized and shaped to hold a c size battery , such as the bay 67 shown in fig2 . fig1 illustrates a further accessory container 380 that can be used in any of the heretofore described embodiments . the container 380 includes a rectangular body 384 having an open top 386 and a closed bottom 390 . a lid 392 is connected to the body 384 by a film hinge 396 . as can be readily understood , the lid 392 can be folded over and pressed down around the body 384 to close the open top 386 to form an enclosed container . sidewalls 400 of the lid 392 are sized to the resiliently engaged by the body 384 to hold the lid in the closed configuration . the container 380 is sized and shaped substantially identically to a 9v size battery . thus , the container 380 can be held in any of the compartments sized and shaped to hold a 9v size battery , such as the bay 60 shown in fig2 . fig1 and 20 illustrate a further aspect of the invention wherein a device 600 includes a frame 604 that is modular in construction . a first frame module 604 a is connectable to a second frame module 604 b . the first frame module 604 a includes a plurality of bays 606 . the bays 606 illustrated are configured and sized to hold d size batteries . the second frame module 604 b includes a plurality of bays 610 . the bays 610 illustrated are configured and sized to hold aaa size batteries . the first frame module 604 a includes a base frame rail 614 that is connected to , or molded with , the bays 606 . the second frame module 604 b includes a base frame rail 616 that is connected to , or molded with , the bays 610 . the first frame module 604 a includes hooks 620 , 622 that curve away from each other . the hook 620 is molded with the base frame rail 614 . the hook 622 is molded with an upper portion of one of the bays 606 . the hooks 620 , 622 are substantially vertically aligned . the second frame module 604 b includes hooks 630 , 632 that curve toward each other . the hook 630 is molded with the base frame rail 616 . the hook 632 is molded with an upper portion of one of the bays 610 . the hooks 630 , 632 are substantially vertically aligned . to assemble the frame 604 , the modules 604 a , and 604 b are relatively slid along the direction “ z ” to interlock the hooks as shown in fig2 . to enhance versatility of assembling modules , each module 604 a , 604 b includes , on a side opposite to the heretofore described hooks 620 , 622 and 630 , 632 , additional hooks having an opposite curvature . for example , the module 604 b includes hooks 640 , 642 that curve away from each other , identically configured to the hooks 620 , 622 of the module 604 a . thus , a series of modules identical to the module 604 b could be assembled together , with hooks 630 , 632 engaged to hooks 640 , 642 of a like module , engaged in similar fashion to that shown in fig2 . a stack of modules of like or unlike types can be assembled in series , or “ daisy chained ”, to form a modular frame . thus , one group of bays 606 that are sized and shaped for holding one or more batteries can be attached to one or more bays 610 sized and shaped to hold one or more batteries of a same size as the batteries held in bays 606 , or a different size as illustrated in fig1 and 20 . fig1 and 20 , for simplicity of illustration , illustrate only a few bays 606 and a few bays 610 , it should be understood however that any number of bays within a module could be configured into a modular frame . also , the parting plane of the modules could be across a vertical lateral plane , or across a vertical longitudinal plane , or across a horizontal plane , taken with the device oriented upright as shown in fig2 . according to the preferred embodiments , the heretofore described frames are composed of a suitable plastic such as polypropylene or polycarbonate , and are preferably injection molded . as an enhancement , the plastic can be a phosphorescent resin such as a resin series 100 ( pp ) polypropylene or series 300 ( pc ) polycarbonate available from rtp company of winona , minn ., usa . such plastics will make the frames luminescent (“ glow in the dark ”). accordingly , the frames will glow after absorbing light and can be easily located and handled even in a dark room or in a dark airplane cabin . fig2 illustrates an alternate embodiment 700 that can be configured in accordance with any of the heretofore described embodiments except as modified as described . for example the frame 700 can be configured substantially identically to the frame 20 shown in fig1 . the frame 700 includes contacts 706 , 708 imbedded into , or otherwise carried by , the bottom wall 26 of the frame . the contacts 706 , 708 are configured to engage the corresponding contacts 712 , 714 of an inverted , rectangular 9 volt battery 716 . a plurality of lamps 720 a , 720 b , 720 c , 720 d are arranged each within one void 722 a , 722 b , 722 c , 722 d that are arranged within the frame 20 , 700 . as illustrated in fig1 and 22 , the void 722 c is formed centrally between the four bays 61 , 62 , 64 , 65 and the void 722 d is formed centrally between the four bays 62 , 63 , 64 , 65 . the voids 722 a , 722 b are similarly formed on an opposite longitudinal side of the frame 20 , 700 . the lamps 720 a , 720 b , 720 c , 720 d are preferably light emitting diodes ( led &# 39 ; s ). although four lamps are shown , any number equal to or greater than one is encompassed by the invention . one contact , such as the negative contact 708 , is wired in parallel to a first contact of each lamp 720 a , 720 b , 720 c , 720 d , via a wire system or bus 730 . the respective other contact , such as the positive contact 706 is wired via a lead 732 to a switch 734 . the switch 734 includes a button or slide 734 a operable by the user to change the open / closed state of the switch 734 . the switch 734 is wired via a wire system or bus 738 to a second contact of each lamp 720 a , 720 b , 720 c , 720 d . preferably the wire systems and lead 730 , 732 , 738 are embedded into the bottom wall 26 of the frame 700 . the wire systems and lead can be actual wires or printed or deposited conductors , such as used in a printed circuit board . the lamps 720 a , 720 b , 720 c , 720 d can be embedded into the bottom wall 26 or frictionally or adhesively fit or otherwise fixed into the voids 722 a , 722 b , 722 c , 722 d . the switch 734 can be located on either end of the frame or anywhere else on the frame . the switch can be embedded into a wall of the frame or otherwise secured to the frame . fig2 - 25 illustrates an alternate accessory 800 that can be configured to be usable with any of the heretofore described embodiments . for example the accessory 800 can be configured to fit within the central bay 60 of the frame 20 shown in fig1 and 2 . the accessory 800 includes a sub frame 802 having a bottom wall 803 and upright side walls 804 , 805 . the sub frame can be composed of an optical grade plastic . contacts 806 , 808 are imbedded into , or otherwise carried by , the bottom wall 803 of the sub frame 802 . the contacts 806 , 808 are configured to engage the corresponding contacts of an inverted , rectangular 9 volt battery 716 ( shown in phantom ). lamps 820 a , 820 b are carried by the upright walls 804 , 805 respectively at an elevation approximately half way up the height of the battery 716 . the lamps 820 a , 820 b can be wired to the contacts 806 , 808 by leads 806 a , 806 b ; 808 a , 808 b embedded into , or guided by , the walls 804 , 805 and bottom wall 803 of the sub frame 802 . the contacts 806 , 808 and the leads 806 a , 806 b , 808 a , 808 b can be overmolded with the optical grade plastic of the sub frame . a switch 810 can be provided wired into said leads . the switch provides a lever or button 811 which selectively connects the lamps 820 a , 820 b to the battery 716 via the contacts 806 , 808 . the button is preferably located on the sub frame 802 at a position to be finger accessible through the frame 20 , when the sub frame is installed on the frame . the switch 810 can be located on any side or bottom of the frame or anywhere else on the frame . the switch can be embedded into a wall of the frame or otherwise secured to the frame . the switch 810 is optional as the means of turning on the lamps can be merely the snapping of the battery 716 down onto the contacts 806 , 808 . when the sub frame 802 is placed into the bay 60 , the lamps 820 a , 820 b are received into triangular voids 822 a , 822 b shown in fig8 . when powered by the battery 716 , the lamps 820 a , 820 b will illuminate the frame 20 by conduction of light throughout the frame 20 , given a selection of translucent material for the construction of the frame . the lamps 820 a , 820 b are preferably light emitting diodes ( led &# 39 ; s ). although two lamps are shown , any number equal to or greater than one is encompassed by the invention . the side walls 804 , 805 each include a prong 804 a , 805 a for removably securing the sub frame 202 to the frame 20 in a snap fitting fashion . fig2 - 29 illustrate an alternate battery holding device 900 including a frame 920 that can hold a plurality of batteries “ b ” ( fig2 ). the frame 920 is preferably a unitary molded plastic piece . the frame 920 includes a bottom wall 926 and sidewalls 928 , 930 . at least one of the sidewalls 928 includes a lower row of openings 944 . the sidewalls 928 , 930 have outside contours that are substantially parallel to the outside contours of the batteries held within the frame 920 . thus , even in a dark environment , a user can , by feel of the outside contour of the frame 920 , ascertain the size of a battery held within the frame . according to the illustrated embodiment , the frame holds four aa size cylindrical batteries . the sidewall openings 944 can be sized sufficiently such that a user &# 39 ; s finger can actually directly feel the outside contour of a battery held within the frame to determine the size of the battery , even in the dark . the batteries held within the frame 920 can be exposed through the openings 944 . furthermore , the bottom wall 926 is recessed adjacent to the lower row of openings 944 such that a bottom surface “ s ” of a battery held within the frame can be exposed to a user &# 39 ; s touch . according to the preferred embodiment illustrated in fig2 , the frame is preferably injection molded plastic having an average thickness “ th ” ( fig2 ) of about 2 mm . according to the embodiment of fig2 - 29 the frame 920 provides four bays 961 - 964 that are generally formed as cylindrical tubes . each bay includes a top opening 961 a and a bottom opening 961 b that is partially closed by the bottom wall 926 . each bay also includes the lower sidewall opening 944 that is open to the bottom opening 961 b . the opening 944 can be about ⅜ inch tall and circumscribes about 90 °- 120 ° of the circumference of the cylindrical tube . as shown in fig2 , the bottom wall 926 includes an irregular longitudinal edge 927 that extends along the longitudinal extent of the frame 920 . the edge 927 is recessed from a lateral extent of the bays to limit the bottom openings 961 b and to expose the bottom surface “ s ” of the batteries “ b ” held within the bays to a user &# 39 ; s touch to allow the user &# 39 ; s finger to press the batteries from below . the bottom wall 926 also provides apertures 928 for the bays to receive the positive terminal “ t ” of a typical battery “ b ”. according to the invention , a top packaging membrane 980 such as a polymer film or a foil closes the top opening 961 a and retains the battery “ b ” within the bay . a bottom membrane 982 , such as a polymer film or foil closes the bottom openings 961 b , 944 . the membranes 980 , 982 can comprise shrink wrap films or foils , or adhesively secured membranes . preferably , the top membrane 980 is one wherein sufficient upward force by a battery with respect to the frame 920 will cause a bursting or tearing of the foil by the thrusting battery and allow removal of the battery . alternately , the connection between the membrane and the frame could be designed , such as by adhesive selection , such that the membrane could be broken away from the frame , without necessarily tearing , by user force on the battery to allow removal of the battery . the lower membrane 982 can be selected such that radial inward force on the membrane 982 either tears , separates the membrane from the frame , or stretches the membrane such that the user &# 39 ; s finger can underlie the battery bottom edge within the compartment , whether by direct contact or through the thickness of the membrane 982 , to thrust the battery upward and through or past the top membrane 980 . the lower membrane 982 can be on an inside surface of each bay as shown or on an outside surface as shown by 982 ′. according to an exemplary embodiment , the lower membrane 982 ( or 982 ′) seals each bay individually so that if one battery is removed and the membrane 982 ( or 982 ′) is ruptured or otherwise opened , the sealed integrity of the remaining bays by the membranes 982 ( or 982 ′) is maintained . the invention of fig2 - 29 allows for packaging of the batteries for retail and also provides a battery holder that can have all the convenience attributes set forth in the initially described embodiment . the membranes 980 , 982 can surround the frame 920 and batteries to seal off the batteries completely from the ambient atmosphere . this makes the retail battery package waterproof or water resistant and protects the batteries from dirt and debris . fig3 - 34 illustrate an alternate battery holder 1000 including a frame 1020 that can hold a plurality of batteries “ b ” ( fig3 ). the frame 1020 is preferably a unitary molded piece . the frame 1020 includes a bottom wall 1026 and sidewalls 1028 , 1030 . one of the sidewalls 1028 includes an upper row of openings 1038 and a lower row of openings 1044 . in the illustrated embodiment , the sidewalls 1028 , 1030 have outside partial - cylindrical contours that are substantially parallel to the outside contours of the batteries held within the frame 1020 . thus , even in a dark environment , a user can , by feel of the outside contour of the frame 1020 , ascertain the size of a battery held within the frame . furthermore , the openings , either the upper row 1038 or the lower row 1044 can be sized sufficiently such that a user &# 39 ; s finger can actually directly feel the outside contour of a battery held within the frame to determine the size of the battery , even in the dark . the sidewall 1030 includes an intermediate , vertically arranged elongated opening 1045 . the batteries held within the frame are exposed through the openings 1038 , 1044 , 1045 . furthermore , the bottom wall 1026 is recessed adjacent each of the lower row of openings 1044 such that a bottom surface “ s ” of a battery held within the frame is exposed to a user &# 39 ; s touch . according to the embodiment , the frame 1020 is preferably injection molded plastic having an average thickness “ th ” ( fig3 ) of about 2 mm . bays 1061 - 1064 are formed as cylindrical tubes which include a top opening 1061 a and a bottom opening 1061 b that is partially closed by the bottom wall 1026 . the lower sidewall opening 1044 is about ⅜ inch tall and circumscribes about 90 °- 120 ° of the circumference of the cylindrical tube . the bays 1061 - 1064 each includes an upper sidewall opening 1038 that is about ⅜ inch in height and circumscribes about 90 °- 120 ° of the cylindrical tube circumference . the bottom wall 1026 includes an irregular longitudinal edge 1027 that extends along the longitudinal extent of the frame 1020 . the edge 1027 is recessed from a lateral extent of the bays to limit the bottom openings 1061 b and to expose the bottom surface “ s ” of the batteries “ b ” held within the bays to a user &# 39 ; s touch to allow the user &# 39 ; s finger to press the batteries from below . the lower sidewall openings 1044 of the bays are contiguous with the bottom openings 1061 b formed by the edge 1027 to allow the user &# 39 ; s finger to not only press the bottom surface “ s ” of the batteries but to slide the batteries toward the top open ends of the bays to eject the batteries . the bottom wall provides apertures 1028 for the bays to receive the positive terminal “ t ” of a typical battery “ b ”. because of the apertures 1028 , a battery can be put into the compartment with the extending terminal either oriented at the top or bottom of the battery . fig3 and 34 illustrate the frame 1020 in more detail with the batteries removed . a metallic spring detent 1090 is fixed to the frame 1020 within each bay 1061 - 1064 for releasably holding a battery “ b ” within individual bays . the detent 1090 is set within a slot 1091 at the top end of the bay . the detent 1090 includes a base portion 1092 that is embedded or molded into the plastic material of the frame 1020 . the detent 1090 also includes a shallow , z - shaped clasp portion 1094 that is cantilevered from the base portion 1092 and is resiliently biased to a position within the top opening 1061 a but can be resiliently deflected away from the top opening 1061 a , outwardly , in order to insert or remove a battery through the top opening 1061 a . from the foregoing , it will be observed that numerous variations and modifications may be effected without departing from the spirit and scope of the invention . it is to be understood that no limitation with respect to the specific apparatus illustrated herein is intended or should be inferred .