Can this power bank charge a laptop?

Only low-power laptops that charge over USB-C at 45W or less, such as some ultrabooks and Chromebooks. It will not keep up with a gaming laptop or a MacBook Pro under load.

How many times can it charge a phone?

A typical 4,000–5,000mAh phone gets roughly four full charges, less in practice because of conversion losses. Expect fewer charges for large phones or if you charge several devices at once.

Does 45W apply to all ports?

No. The 45W is the total USB-PD budget, so plugging in several devices splits the power and each charges more slowly. One device alone on USB-C gets the full rate.

Is it safe to take on a plane?

At 20,000mAh (about 74Wh) it is under the common 100Wh carry-on limit for lithium batteries, so it can usually go in cabin baggage. Check your airline's rules and keep it in your carry-on, not checked luggage.

What comes in the box?

Typically the power bank and a short USB charging cable. A wall charger is not included, so you need your own USB-C adapter to recharge it.

How long does it take to recharge?

Recharging a 20,000mAh pack takes several hours even with a fast USB-C charger, and longer with a basic one. Plan to charge it overnight before a trip.