electrical contact since it is adapted to insert solely into the neutral i e insulated part of the socket i e the negative electrode is not long enough to establish electrical contact with the positive part of the socket for a parallel connection depicted in the side view in fig5 a the negative electrode 33 is inserted into the negative socket 35 and the positive electrode pin 32 has sufficient length to permit it to establish electrical contact with the positive part of the positive socket 36 various modifications of the cell design of fig4 can be usefully employed and are applicable to many of the alternate cell designs described herein for example the peripheral sockets and peripheral pins of fig4 can be interchanged so that the top of the battery contains the original central positive pin and two female sockets one positive and the other negative and the bottom of the cell contains the original central socket and two peripheral pins one positive and the other negative similarly the pins and sockets can be conveniently configured for example using springs in the sockets so as to minimize contact electrical resistance via the employment of lateral mechanical forces additionally the displacement of a spring activated switch can be employed in socket 36 which will make electrical contact to the positive electrode for the long pin pin 32 but not for the short pin pin 33 in a third embodiment of the invention shown in fig6 plate shaped prong connectors are used rather than pins top and bottom views of such a cell are depicted by fig6 a through 6d a central positive electrode 31 provides the standard end connection when cells are placed end to end this electrode fits into a neutral socket 34 a negative.