Can any power bank charge a laptop?

No. Laptops need USB-C Power Delivery output high enough, commonly 60W to 100W, to charge at a reasonable rate.

What's the difference between capacity and wattage for a power bank?

Capacity is how many charges it can deliver. Wattage is how fast. A laptop power bank needs both.

Can I bring a laptop power bank on a flight?

Most airlines limit carry-on power banks to 100Wh without special approval, which caps the size you can fly with.

What wattage should I look for in a laptop power bank?

At least 60W of USB-C PD for most laptops. Check it against your own laptop's charging requirement.

Are laptop-capable power banks heavier than phone power banks?

Generally, yes. The higher capacity and wattage parts add bulk and weight.

Best Power Bank for Laptops: What Wattage and Capacity You Actually Need

Most power banks are built for phones, not laptops. The wattage and capacity specs that matter for charging a laptop on the go.

Short answer: get a power bank with at least 60W of USB-C Power Delivery output and capacity near the 100Wh airline carry-on limit. That is the best balance of laptop charging and travel for most buyers.

Charging a laptop, not just topping up a phone, needs much higher wattage and capacity than a typical portable charger. Check both specs before you buy.

Why Laptop Charging Needs More Than a Phone Power Bank

Laptops need far more power to charge than phones. A power bank needs USB-C Power Delivery output of commonly 60W to 100W, depending on your laptop. Below that, it barely offsets battery drain while you work.

Many power banks sold as "high capacity" top out at wattages fine for phones and tablets. They are not enough for a laptop.

Capacity vs Wattage: Both Matter Separately

Capacity (mAh or Wh): how many charges the power bank can deliver.
Wattage: how fast it delivers that power.

A laptop power bank needs both. High capacity with low wattage charges a laptop too slowly to be practical. Check the PD wattage rating, not just the mAh figure.

Airline Carry-On Restrictions Are a Real Constraint

Most airlines restrict carry-on power banks to 100Wh without special approval. That caps how large a laptop power bank you can fly with. Check the Wh rating, not just mAh, against your airline's limit before buying.

High-Wattage, High-Capacity Power Banks

Output: USB-C PD high enough for your laptop, commonly 60W to 100W
Capacity: high, ideally near the 100Wh carry-on limit if you fly
Downside: bulkier, heavier and pricier than phone power banks

These can charge a laptop at a usable speed. The catch is size and price.

Buy it if: you need to charge a laptop away from an outlet.

Skip it if: you only ever top up a phone; a standard phone power bank is lighter and cheaper.

Standard Phone Power Banks

Weight: light
Price: inexpensive
Output: too low for practical laptop charging

Buy it if: you only charge phones and tablets.

Skip it if: you want to charge a laptop; get a high-wattage power bank with 60W or more of USB-C PD.

What to Check Before Buying

PD output: confirm the USB-C PD wattage meets or exceeds your laptop's charging requirement, not just the total capacity.
Flying: check the Wh rating against your airline's carry-on power bank limit.

Our Pick

A power bank with 60W or more of USB-C PD output and capacity near the 100Wh airline limit.

Related on Consumercarts

From the Consumercarts catalog:

What wattage does your laptop charger put out, and has a power bank ever kept up with it? Tell us at hello@consumercarts.com.

The specs manufacturers skip: we counted publication rates across 196 laptops. Colour gamut, 66 of 196. Brightness, 93 of 196. Charger wattage, 96 of 196. Battery runtime, 30 of 196.