A battery sensor for a battery, with a) a pole terminal made out of an electrically conductive material for electric connection of the battery sensor to a connecting contact of a battery, b) a low-ohm current-sense resistor for the measurement of a battery current with which the battery is discharged or charged, wherein b1) the current-sense resistor comprises a first plate-shaped connection part made out of a conducting material and b2) a second plate-shaped connection part made out of the conducting material and b3) a plate-shaped resistance element made of a resistance alloy, b4) wherein resistance element is arranged in the current path between both connection parts (5, 6), and b5) the conductor material has a smaller specific electric resistance than the resistance alloy, and with c) several tongues protruding from the pole terminal for mechanical mounting of the current-sense resistor on the pole terminal, wherein c1) a first tongue of the pole terminal mechanically supports the first connection part of the current-sense resistor from below, c2) the first tongue electrically contacts the first connection part of the current-sense resistor, c3) a second tongue of the pole terminal supports the current-sense resistor from below, characterized in that d) an electrically insulating plastic sheathing sheaths the current-sense resistor and the tongues of the pole terminal, e) the plastic sheathing consists of a thermosetting plastic, and f) the current-sense resistor and the tongues of the pole terminal are coated with the thermosetting plastic, g) the second connection part of the current-sense resistor form a current contact for introducing or discharging the battery current, h) a third tongue of the pole terminal supports the current-sense resistor from above, i) the second tongue and the third tongue of the pole terminal are outwardly electrically insulating in order to avoid any electric contact with the current-sense resistor, and j) the second tongue and the third tongue support the current-sense resistor between the two connection parts (5, 6), in order to absorb a mechanical loading at the second connection part used as power connection. a) a pole terminal made out of an electrically conductive material for electric connection of the battery sensor to a connecting contact of a battery, b) a low-ohm current-sense resistor for the measurement of a battery current with which the battery is discharged or charged, wherein b1) the current-sense resistor comprises a first plate-shaped connection part made out of a conducting material and b2) a second plate-shaped connection part made out of the conducting material and b3) a plate-shaped resistance element made of a resistance alloy, b4) wherein resistance element is arranged in the current path between both connection parts (5, 6), and b5) the conductor material has a smaller specific electric resistance than the resistance alloy, and with b1) the current-sense resistor comprises a first plate-shaped connection part made out of a conducting material and b2) a second plate-shaped connection part made out of the conducting material and b3) a plate-shaped resistance element made of a resistance alloy, b4) wherein resistance element is arranged in the current path between both connection parts (5, 6), and b5) the conductor material has a smaller specific electric resistance than the resistance alloy, and with c) several tongues protruding from the pole terminal for mechanical mounting of the current-sense resistor on the pole terminal, wherein c1) a first tongue of the pole terminal mechanically supports the first connection part of the current-sense resistor from below, c2) the first tongue electrically contacts the first connection part of the current-sense resistor, c3) a second tongue of the pole terminal supports the current-sense resistor from below, characterized in that c1) a first tongue of the pole terminal mechanically supports the first connection part of the current-sense resistor from below, c2) the first tongue electrically contacts the first connection part of the current-sense resistor, c3) a second tongue of the pole terminal supports the current-sense resistor from below, characterized in that d) an electrically insulating plastic sheathing sheaths the current-sense resistor and the tongues of the pole terminal, e) the plastic sheathing consists of a thermosetting plastic, and f) the current-sense resistor and the tongues of the pole terminal are coated with the thermosetting plastic, g) the second connection part of the current-sense resistor form a current contact for introducing or discharging the battery current, h) a third tongue of the pole terminal supports the current-sense resistor from above, i) the second tongue and the third tongue of the pole terminal are outwardly electrically insulating in order to avoid any electric contact with the current-sense resistor, and j) the second tongue and the third tongue support the current-sense resistor between the two connection parts (5, 6), in order to absorb a mechanical loading at the second connection part used as power connection.