Abstract: The invention is based on a spare handheld power tool module, having at least one interface that has at least one contact region and at least one electrical contact that is disposed at least partly in the contact region. It is proposed that the interface has at least one closure unit, which is provided for covering the contact region.

Abstract: A handheld power tool charger, having at least one battery contact device is proposed, which is provided for charging at least one nondiscretely positioned handheld power tool battery. According to the invention, the battery contact device has at least one contact region which is embodied as elongated.

Abstract: The invention relates to a battery pack comprising at least one battery cell and a housing for accommodating the at least one battery cell. It is proposed that the housing is designed as at least double-walled having at least one inner sheath and one outer sheath. According to the invention, an intermediate volume is enclosed between the at least one inner sheath and the outer sheath. The intermediate volume is able to absorb a pressure wave from an internal volume containing the battery cells.

Abstract: The invention is based on a rechargeable battery charging case, in particular a cordless handheld power tool case, having at least one battery attachment device and a case body. It is proposed that the rechargeable battery charging case has an electrical energy output and a supply unit, which in at least one operating state is connected to the energy output and to the battery attachment device for supplying the energy output.

Abstract: The invention relates to a charging device for charging at least one rechargeable energy storage unit, having a defined inner resistance and having a compensation circuit for the compensation of a voltage drop during the charging operation caused by the inner resistance. The compensation circuit has a current detection for detecting a charge current of the rechargeable energy storage unit and a voltage regulator for adjusting the charge voltage to the detected charge current. The charging device is characterized in that the compensation circuit has a voltage distributor between the current detector and the voltage regulator, by the dimensioning of which the compensation of the inner resistance is carried out.

Abstract: Charging devices which can be operated in a plurality of manually selectable charging modes and which have a discharging device are known. According to the invention, a storage charge mode which is optimized for storage of the accumulator is proposed. For this purpose, a device for determining the charge state of the accumulator is provided. When the storage charge mode is activated, the accumulator is charged only up to a predefined, optimized partially charged state, in which case the discharging device discharges the accumulator as far as the predefined partially charged state if the charge state which is determined at the start of the storage charge mode is higher than the predefined partially charged state.

Abstract: The invention describes a battery pack for a handheld power tool, which can be connected replaceably to a handheld power tool and has a housing, in which a single battery cell is received in the housing.

Abstract: Storage batteries having a rechargeable battery for operating electric tools often have a state of charge indicator. A state of charge circuit, which has a sensor that is coupled to the evaluation unit, is provided in order to identify the operating state of the storage battery. An interlock switch for preventing indication of the state of the charge is coupled to the evaluation unit. If charging or discharging of the rechargeable battery is identified using the sensor, the interlock switch is used to prevent indication of the current state of charge.

Abstract: The invention relates to a loading device (10, 100), comprising a charging device (12) and at least a changeable, rechargeable energy storage (14), particularly an interchangeable battery (18), of a power tool (16), wherein each energy storage (14) comprises first contact means (24) for contacting the respective power tool (16). The loading device (10, 100) is characterized by each energy storage (14) having further contact means (38) for contacting the charging device (12) such that the charging device (12) can charge the energy storage (14) via the further contact means (38) in a state when connected to the power tool (16), as well as in a state when not connected to the power tool (16).

Abstract: A charging-unit receiver has at least one transmission unit provided for transmitting information, and the transmission unit is configured for a teletransmission of the information.

Abstract: A charging unit has at least one housing element, and the housing element has at least a portion which is composed of a light-permeable material.

Abstract: A charger for a rechargeable battery (4) has one circuit (5), connectable to a supply voltage (V) and furnishing the charging current for the battery, and one circuit (6), connected in a parallel circuit to the first circuit and required for regulating the charging current. In the parallel circuit a switch (7) is provided, which interrupts the parallel circuit if the circuit (5) that furnishes the charging current is disconnected from the supply voltage (V). This prevents a leakage current from flowing out of the battery (4) via the parallel circuit and thereby discharging the battery (4) when the charger (1) is switched off from the supply voltage (V).

Abstract: In a method for controlling the strength of a charging current when charging a battery by means of an alternating voltage source, the rectified voltage of the alternating voltage source is fed to the battery via a phase control circuit with variable triggering angle. The battery voltage is measured and the value of the triggering angle to be set is identified as a function of the measured battery voltage and the voltage of the alternating voltage source.