How fast does the solar panel charge the battery?

Slowly. The panel is a trickle charger meant to top up the battery outdoors over hours, not to refill 15,600 mAh quickly. Use a USB-C wall charger when you have an outlet.

Does it work with non-iPhone phones?

Yes. The USB-A and USB-C ports charge Android phones and other devices by cable. The magnetic wireless alignment is designed for MagSafe iPhones; other phones need a magnetic case or ring to hold position.

Can it charge four devices at once?

Yes, one wirelessly plus one on USB-A and two on USB-C. Expect slower charging per device when all ports are in use.

Is it allowed in carry-on luggage?

Yes. At 15,600 mAh it is well under the 100 Wh limit most airlines set for carry-on power banks. Keep it in your cabin bag, not checked luggage.

What comes in the box?

The power bank and a charging cable. A wall adapter is not included, so use your own USB-C charger to refill it from an outlet.

Is it worth it over a slim magnetic power bank?

If you want the smallest possible pocket bank, a slim 10,000 mAh magnetic pack is lighter. The Solarbank gives you more capacity, extra ports and a solar top-up for camping and emergencies, at the cost of size and weight.