The VoltPro charger that shipped with your wheelchair meets voltage requirements for the country in which it was provided. For the US/CAN versions, charger input is 120V. If traveling to another country with different voltage, Permobil does offer an alternative charger that accepts 220-240V.
Permobil batteries are approved for air transport. Please check with applicable airlines for information regarding traveling with a power wheelchair. For more information please check out our blog with additional travel related resources https://hub.permobil.com/blog/wheelchair-traveling-checklist.