Likewise, the MPPT varies the ratio between the voltage and current delivered to the battery, in order to deliver maximum power. If there is excess voltage available from the PV, then it converts that to additional current to the battery. Furthermore, it is like an automatic transmission.
On the Supreme Court of the United States, Associate Justices Potter Stewart and Anthony Kennedy have been described as swing votes between the two factions of the court. In the United Kingdom, the  Essex man ,  Worcester woman  and  Holby City woman  are examples of personifications of swing voters.
In 1981, President Ronald Reagan, fulfilling a campaign promise to nominate a qualified woman to the Supreme Court, nominated Sandra Day O'Connor. She was confirmed by the Senate with 91 votes, becoming the first woman to serve as a justice on the US Supreme Court.