Patent ID: 8884580

Claim:
A circuit comprising: a first cluster comprising a first energy transmitter coupled to a first node and a second node, the first energy transmitter configured to: receive a first input current from a first battery through a first connection and a second connection; generate a first output current through a third connection to the first node and a fourth connection to the second node; receive a second input current through the third and fourth connections from the first and second nodes; generate a second output current through the first and second connections to charge the first battery; and a second cluster comprising a second energy transmitter coupled to a third node and a fourth node, the second energy transmitter configured to: receive a third input current from a second battery through a fifth connection and a sixth connection; generate a third output current through a seventh connection to the third node and an eighth connection to the fourth node; receive a fourth input current through the seventh and eighth connections from the third and fourth nodes; generate a fourth output current through the fifth and sixth connections to charge the second battery; and a third energy transmitter coupled to the first cluster and the second cluster, the third energy transmitter configured to transfer current between the first cluster and the second cluster.