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.
The court's new swing justice, Anthony Kennedy, was in the majority in each of the 24 5-to4 rulings. And Supreme Court scholar Tom Goldstein says Kennedy's influence has been significant. No justice has had so strong an influence on a Supreme Court term in at least 40 years, says Goldstein..