Patent ID: 8310209

Claim:
A battery charger for charging a battery, said battery charger comprising: an AC/DC power supply means, a pulse width modulation controlled DC/DC converter, a control unit that is connected to the AC/DC power supply means and the pulse width modulation controlled DC/DC converter, wherein said control unit is adapted to measure at least a voltage and a current at terminals of the battery to be charged, calculate a power at the battery based on the measured voltage and current, compare the calculated power and the nominal maximum power of the AC/DC power supply means, and transmit a signal to the pulse width modulation controlled DC/DC converter to adjust a charging current supplied to the battery based on the comparison result, wherein the control unit is further adapted to measure a temperature of the battery and to transmit the measured temperature of the battery in the signal to the pulse width modulation controlled DC/DC converter to adjust the charging current supplied to the battery.