Can it charge a laptop?

It can top up small, low-power USB-C laptops, but 45W is below what most full-size laptops need to charge at full speed. Expect slower charging or a slow drain under heavy load.

Does it come with a cable?

Yes. The dual USB-C cable is built into the pack, so you do not need to bring a separate cord for USB-C devices.

Can it charge two devices at once?

Yes, it has more than one output, but the 45W is shared between devices when both are connected, so each charges more slowly.

How long does it take to recharge?

With a USB-C PD charger it refills in a few hours; with a standard charger it takes considerably longer.

Is it allowed on a plane?

At 20000mAh it is within the usual carry-on limit for lithium batteries, but it must go in the cabin, not checked baggage. Check your airline's rules before flying.