(JP2000350375-A)   NOVELTY - The capacity leveling arrangement for series-connected cells (C1...C4) forming a battery (B) uses voltage dividing circuits (P1...P4) having correcting diodes (D1), and series connected resistors (RA,RB) with their junctions connected to a voltage detecting circuit (1). The voltage dividing circuits have photo FETs (11...14) as switches with light emitting and receiving diodes in the FET packages. A single photo FET (21) is used by the discharging circuits (D1...D3) and the FET gate is connected to the switching control circuit (5) which controls the voltage dividing circuits with ON/OFF signals and supplies the switching control circuit with an inverted ON/OFF signal.    USE - Provides a control circuit for a battery e.g. one providing traction power for an electric vehicle.    ADVANTAGE - Provides an improved circuit for capacity leveling a series-connected group of cells e.g. forming a traction power battery for an electric vehicle and especially for cells where overcharging must be avoided e.g. lithium-ion cells.    (US6191555-B1)   NOVELTY - The capacity leveling arrangement for series-connected cells (C1...C4) forming a battery (B) uses voltage dividing circuits (P1...P4) having correcting diodes (D1), and series connected resistors (RA,RB) with their junctions connected to a voltage detecting circuit (1). The voltage dividing circuits have photo FETs (11...14) as switches with light emitting and receiving diodes in the FET packages. A single photo FET (21) is used by the discharging circuits (D1...D3) and the FET gate is connected to the switching control circuit (5) which controls the voltage dividing circuits with ON/OFF signals and supplies the switching control circuit with an inverted ON/OFF signal.    USE - Provides a control circuit for a battery e.g. one providing traction power for an electric vehicle.    ADVANTAGE - Provides an improved circuit for capacity leveling a series-connected group of cells e.g. forming a traction power battery for an electric vehicle and especially for cells where overcharging must be avoided e.g. lithium-ion cells.