Patent ID: 8154247

Claim:
A portable telecommunications device comprising: a charging interface for connection to an external power supply; a voltage and current ratio converter configured to convert an input voltage and current at the charging interface into an output voltage and current for charging a battery; a controller comprising a processor and one or more analog-to-digital converters configured to monitor the input voltage and current, wherein the controller is configured to control the voltage and current ratio converter so that the output current for charging the battery is higher than the input current at the charging interface; the controller further comprising a power supply adjuster for adjusting the intake power from the external power supply by adjusting properties of the external power supply, the power supply adjuster being configured to adjust the properties of the external power supply by signaling on the power line by one or more of the following: analog modulation, digital data modulation, current modulation, added or subtracted voltage modulation, load interrupt sequencing, RF, magnetic field variation or inductions.