Best power bank for an iPhone 17 and a laptop in 2026

What actually matters

Start with the laptop, because it sets the wattage you need. Check the charger that came with it: 65W, 100W or 140W. A power bank can charge below that rating but slowly, and under heavy load a laptop may drain the bank faster than it charges. USB-C Power Delivery 3.1 (EPR) is what allows up to 140W, and it needs a cable rated for 5A and e-marked. A cheap phone cable will not do it.

Then look at capacity as watt-hours, not just mAh. A 25,000mAh bank is roughly 92Wh at the cell voltage (25 Ah x 3.7 V), which sits under the common 100Wh airline limit for carry-on power banks. Real usable output is lower because of conversion losses, so expect something like 60-70% of the rated figure, and treat that as an estimate. A 16-inch laptop can drain a bank like this in one or two charges.

For the iPhone 17 family, a USB-C cable is still the fastest and most efficient route. Apple's wired fast charging for these phones is in the 40W class, so any decent 45W+ PD port is enough. Qi2.2 magnetic charging is convenient for a phone on a desk or in a train seat, but it is slower than a cable, wastes more energy as heat, and is usually found on smaller 5,000-10,000mAh packs rather than 25,000mAh laptop-class banks. Look for the Qi2.2 certification on the box or listing, not just 'magnetic'.

Check the port layout before buying. Two or three USB-C ports are better than one, but many banks split the wattage when several ports are in use. Read the listing for the output when two devices are plugged in. A bank that gives 140W on one port and 45W on another is fine; one that drops to 30W each is not. Also check how the bank itself recharges: a 25,000mAh unit that takes 10 hours on a weak charger is annoying, and the best ones recharge at 60-100W or more over USB-C.

Before a trip, check your airline's rules. Banks under 100Wh are generally allowed in carry-on only, never in checked bags, but several airlines have recently restricted using them in flight. Look for safety certifications and a clear Wh rating printed on the unit. We have not hands-on tested any specific product for this guide, so compare listed specs and recent buyer reviews yourself before buying.

Common mistakes

• Buying on mAh alone and ignoring output wattage; a 25,000mAh bank limited to 45W will charge a 100W laptop very slowly.
• Using a cable that is not rated for 100W or 140W (5A, e-marked), then blaming the power bank for slow charging.
• Expecting magnetic Qi2.2 to be as fast as a cable, or assuming any 'MagSafe-style' pack has real Qi2.2 certification.
• Ignoring the port split: output often drops when two or three ports are in use at the same time.
• Packing it in checked luggage or buying a bank above 100Wh without checking airline rules.