(FR2737058-A1)      A combined vehicle battery and control unit has two batteries and a switch (r1) that is normally open for separate battery outputs, but is closed for charging up the batteries in parallel from the generator. One battery is used just by the starter motor, the other for electrical auxiliaries. They have different construction and different charge/discharge characteristics.    The switch is controlled by evaluating the current flow between the batteries or their respective voltages. If the switch is closed and a current of 50 A flows between the batteries, the voltage drop between them is less than 500 millivolts. There is a second switch (r2) normally closed but opened when a certain discharge level is reached.    USE/ADVANTAGE -   For use in vehicles and equipment operating with petrol and diesel IC engines, ships, aircraft etc. Avoids extreme discharge of batteries i.e. down to at a level at which they could no longer start the engine.    (JP9130991-A)      A combined vehicle battery and control unit has two batteries and a switch (r1) that is normally open for separate battery outputs, but is closed for charging up the batteries in parallel from the generator. One battery is used just by the starter motor, the other for electrical auxiliaries. They have different construction and different charge/discharge characteristics.    The switch is controlled by evaluating the current flow between the batteries or their respective voltages. If the switch is closed and a current of 50 A flows between the batteries, the voltage drop between them is less than 500 millivolts. There is a second switch (r2) normally closed but opened when a certain discharge level is reached.    USE/ADVANTAGE -   For use in vehicles and equipment operating with petrol and diesel IC engines, ships, aircraft etc. Avoids extreme discharge of batteries i.e. down to at a level at which they could no longer start the engine.    (US5844325-A)      A combined vehicle battery and control unit has two batteries and a switch (r1) that is normally open for separate battery outputs, but is closed for charging up the batteries in parallel from the generator. One battery is used just by the starter motor, the other for electrical auxiliaries. They have different construction and different charge/discharge characteristics.    The switch is controlled by evaluating the current flow between the batteries or their respective voltages. If the switch is closed and a current of 50 A flows between the batteries, the voltage drop between them is less than 500 millivolts. There is a second switch (r2) normally closed but opened when a certain discharge level is reached.    USE/ADVANTAGE -   For use in vehicles and equipment operating with petrol and diesel IC engines, ships, aircraft etc. Avoids extreme discharge of batteries i.e. down to at a level at which they could no longer start the engine.    (CN1152508-A)      A combined vehicle battery and control unit has two batteries and a switch (r1) that is normally open for separate battery outputs, but is closed for charging up the batteries in parallel from the generator. One battery is used just by the starter motor, the other for electrical auxiliaries. They have different construction and different charge/discharge characteristics.    The switch is controlled by evaluating the current flow between the batteries or their respective voltages. If the switch is closed and a current of 50 A flows between the batteries, the voltage drop between them is less than 500 millivolts. There is a second switch (r2) normally closed but opened when a certain discharge level is reached.    USE/ADVANTAGE -   For use in vehicles and equipment operating with petrol and diesel IC engines, ships, aircraft etc. Avoids extreme discharge of batteries i.e. down to at a level at which they could no longer start the engine.