We are planning a few days outback without electricity. How good is the solar panel in sunlight and how good is the torch? Do you have any experience of this? :-)

Can I take this powerbank with me on the plane?

Yes, that is possible. But the power of the solar panels is not enough to charge a device and the powerbank at the same time. Most of the time, the powerbank is discharged while charging the mobile with simultaneous solar power.

Yes, even two connected devices can be charged when it is in the sun.