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A battery has on opposite sides male and female terminal blocks. The female block includes positive and negative power terminals, a communications line and a link detect line. The female terminals include annular female connectors for receiving a male electrical terminal. The male terminal block has

A battery has on opposite sides male and female terminal blocks. The female block includes positive and negative power terminals, a communications line and a link detect line. The female terminals include annular female connectors for receiving a male electrical terminal. The male terminal block has a recess for accommodating the female terminal dock. Within the recess there extend a plurality of male terminal pins, which include a positive voltage terminal, a communications line terminal, a battery status terminal and a negative or nominal ground terminal. The pins are positioned and sized so as to fit into respective female terminals. As each battery is provided with both female and male terminal blocks, any number of batteries can be stacked together. The male block includes a protective cover and latch for protecting the pins and locking the battery to a device or other battery.

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1. A battery coupling arrangement for coupling an electrical battery to a device, the battery coupling arrangement comprising: a female connector unit provided with a plurality of female electrical terminals;a male connector unit including a plurality of male electrical terminals, wherein the male e

1. A battery coupling arrangement for coupling an electrical battery to a device, the battery coupling arrangement comprising: a female connector unit provided with a plurality of female electrical terminals;a male connector unit including a plurality of male electrical terminals, wherein the male electrical terminals are in the form of pins, and the female electrical terminals include bores or channels into which the pins of the male electrical terminals can pass and be held;a protective barrier located to protect the pins of the male electrical terminals;a support element configured to support and hold free ends of the pins of the male electrical terminal when the pins are exposed from the protective barrier; andwherein at least one of the electrical battery or the device comprises at least one of the female connector unit or the male connector unit. 2. A battery coupling arrangement according to claim 1, wherein the protective barrier and the male electrical terminals are movable relative to one another from a protective position in which the barrier at least partially overlies the pins and an active position in which the pins are exposed. 3. A battery coupling arrangement according to claim 2, wherein the protective barrier is movable. 4. A battery coupling arrangement according to claim 2, wherein the protective barrier substantially envelops the pins in the protective position. 5. A battery coupling arrangement according to claim 1, wherein the support element includes recesses or openings for receiving the free ends of the pins. 6. A battery coupling arrangement according to claim 1, wherein the support element is connected to the protective barrier. 7. A battery coupling arrangement according to claim 6, wherein the support element is integral with the protective barrier. 8. A battery coupling arrangement according to claim 6, wherein the support element moves with the protective barrier. 9. A battery coupling arrangement according to claim 1, wherein the support element supports the free ends of the pins when the pins are engaged with the female electrical terminals of a female connector unit. 10. A battery coupling arrangement according to claim 1, wherein at least one of the protective barrier and the support element is provided with a guide element for guiding a female connector unit towards the pins. 11. A battery coupling arrangement according to claim 10, wherein the or each guide element is a guide surface. 12. A battery coupling arrangement according to claim 11, including guide surfaces located on the protective barrier and the support element, which guide surfaces taper towards the pins. 13. A battery coupling arrangement according to claim 1, including a latch for locking the protective barrier in a pin exposing configuration. 14. A battery coupling arrangement according to claim 13, including a latch actuator operable to unlatch the latch and thereby unlock the protective barrier for the pin exposing configuration. 15. A battery coupling arrangement according to claim 13, wherein the latch is operable to latch a battery provided with the male connector unit to another battery or device provided with the female connector unit. 16. An electrical battery including a battery coupling arrangement for coupling the electrical battery to a device, the battery coupling arrangement including: a female connector unit on the battery and provided with a plurality of female electrical terminals;a male connector unit on the battery and including a plurality of male electrical terminals, wherein the male electrical terminals are in the form of pins and the female electrical terminals include bores or channels into which the pins can pass and be held;a protective barrier located to protect the pins of the male electrical terminals; anda support element configured to support and hold free ends of the pins of the male electrical terminal when the pins are exposed from the protective barrier. 17. An electrical battery according to claim 16, wherein the male and female connector units are located on opposite sides of the battery.