Power Banks

What decides it

Capacity: 10,000 mAh refills a phone about twice; 20,000 mAh or more for laptops and trips. Speed: USB-C Power Delivery at 20–30 W charges phones fast; 65 W+ for laptops. Flights: the FAA allows up to 100 Wh (about 27,000 mAh) in carry-on bags only.

The models we would buy

Start with the Anker Prime Power Bank 26,250 mAh (300 W): charges two laptops at once with a smart display. The Anker Nano Power Bank 10,000 mAh (30 W) is the better buy if you want a small pack that refills your phone twice. Usual prices run from $19 to $229. See the full buy-or-skip list or the head-to-head Anker Prime Power Bank 26,250 mAh vs Anker Nano Power Bank 10,000 mAh.

Buying power banks in the US

Stick to known brands with UL certification: cheap unbranded power banks are a common fire risk. Prices on Amazon.com move in a pattern. The deepest cuts land on Prime Day in July, Prime Big Deal Days in October and the Black Friday to Cyber Monday week, with smaller drops around Presidents Day, Memorial Day, the Fourth of July and back-to-school. Judge a deal against the usual price we show, never against the crossed-out list price.

Quick answers

How many charges will I get? About 60–70% of the rated capacity reaches your phone, so a 10,000 mAh pack gives roughly two full charges. Can I bring a power bank on a plane? Yes, in carry-on only, up to 100 Wh without airline approval.

Order from Amazon itself or the brand's official storefront so the US manufacturer warranty applies, keep your order confirmation and register the product with the brand. Most items can be returned within 30 days, and holiday purchases often get an extended return window into January.

How we make the call: we read spec sheets, manuals and warranty terms, check long-term owner feedback and US support, and track the usual Amazon.com price. A product gets “Buy” only if we would tell a friend to buy it at that price. Brands cannot pay for a verdict.