Apparatus for charging and discharging a battery device

An apparatus for charging a battery device, comprising:

• a power supplying unit operable so as to provide a direct current voltage output;
• a current control unit including a current amplifier and a control load,
• said current amplifier having a power input coupled to said power supplying unit to receive said direct current voltage output therefrom, a bias input, and a current output, said current amplifier being operable so as to amplify a current signal at said bias input and to provide an amplified current signal at said current output, said current output being adapted to be connected to the battery device so as to supply said amplified current signal thereto to initiate charging of the battery device,
• said control load having a current input coupled to said bias input, and a control input;
• an amplifier control unit coupled to said bias input and adapted to be coupled to the battery device, said amplifier control unit generating a first control signal at said bias input to enable said current amplifier when a battery voltage of the battery device is below a predetermined voltage value, and further generating a second control signal at said bias input to disable said current amplifier when the battery voltage reaches the predetermined voltage value;
• and
• a load control unit coupled to said control input and adapted to be coupled to the battery device, said load control unit enabling said control load to adjust magnitude of the current signal at said bias input to adjust in turn magnitude of the amplified current signal at said current output so as to maintain current flow through the battery device at a predetermined current value.