A power supply arrangement for supplying power from a battery (2) to an electric load (3) comprises a controlled switch (4) having a first state in which a connection is provided from the battery (2) to the load (3), and a second state in which the load (3...

An embodiment of the present invention comprises apparatus for and method of managing and distributing power from a supply of limited power. A plurality of outlets is connected to a plurality of power units. In accordance with the present invention, an amo...

Battery-powered tools may include battery 1 or battery pack BP and a drive source (e.g., motor M) for generating power using current supplied from the battery. A switch 3 may electrically connect the battery to the drive source. A voltage detector may dete...

When rechargeable batteries have been discharged to a selected voltage reference level, LED 29 (and/or buzzer BZ) and controller 32 may warn the operator that the rechargeable batteries should be recharged. Controller 32 may change the selected reference v...

An external power source control system for a portable telephone includes: a regulator 5 connected at an input thereof to a battery power source 1 or an external power source 2 and outputting a power supply voltage; a one-shot pulse generating circuit 6 ge...

Device intended to smooth current and voltage transients and consequently prevent the formation of an electric arc during the connection operation by which a charged power battery (1) is put into circuit with an electrical power equipment (2) that it must ...

The present invention relates to a battery cut-out for an automotive vehicle, comprising a disconnecting element (23) for disconnecting the current supply from a battery (21). The battery cut-out also includes an intelligent control unit (28) which is conn...

The method involves assigning an available charge quantity per time unit, preferably per day, the control unit on the basis of the charge capacitance of the charge-coupled device. The charge use of the control unit is monitored and its control movement is ...