Abstract: The present invention is an apparatus (101) for diagnosing, charging and/or discharging electric batteries, said apparatus (101) comprising: a circuit (103) for diagnosing, charging and/or discharging batteries; an electrical connection (105) intended to connect said apparatus to the terminals of a battery; characterised in that said connection (105) includes three electrical conductors, two power conductors (107a, 107b) intended to be connected respectively to the positive and negative terminals of a battery and a measuring electrical conductor (109) intended to be connected to one of the terminals of said battery, and in that said apparatus comprises a voltage drop compensation electronic entity (113) allowing compensating for the voltage drop caused by the said power electrical conductors (107a, 107b).

Abstract: Systems and methods for battery testing are described. Some of the methods for battery testing include applying a first load impedance to a battery, applying a second load impedance to a reference voltage source, measuring a voltage between a positive terminal of the battery and a positive terminal of the reference voltage source, wherein a negative terminal of the battery is connected via a conductor to a negative terminal of the reference voltage source, and determining a condition of the battery based on the measured voltage.

Abstract: Systems and methods for battery testing are described. Some of the methods for battery testing include applying a first load impedance to a battery, applying a second load impedance to a reference voltage source, measuring a voltage between a positive terminal of the battery and a positive terminal of the reference voltage source, wherein a negative terminal of the battery is connected via a conductor to a negative terminal of the reference voltage source, and determining a condition of the battery based on the measured voltage.