A power bank with 20,000 mAh and 45W USB-C PD fits in a jacket pocket and can charge an iPhone 3-4 times or top off a MacBook Air — all without finding an outlet. The best 2026 power banks combine high capacity with the fast charging protocols that modern phones and laptops demand.
We evaluated actual mAh capacity (vs. rated), USB-C Power Delivery wattage, simultaneous charging performance, and size-to-capacity ratio to find the best portable power banks.
What to Look For
- Capacity (mAh): 5,000 mAh provides 1-1.5 full phone charges. 10,000 mAh handles 2-3 charges. 20,000 mAh is the maximum easily flyable on commercial aircraft (TSA allows up to 26,800 mAh or 100Wh without declaration). 30,000 mAh+ requires checking airline limits.
- USB-C Power Delivery (PD): 45W PD charges a laptop slowly but adequately for maintaining charge during use. 65W PD charges a laptop at near-wall-charger speeds. 100W PD handles most laptops including 16-inch MacBook Pro. Check your laptop's USB-C charging requirements before assuming any power bank will work.
- Simultaneous charging: Better power banks maintain full speed on individual ports while multiple devices charge simultaneously. Budget power banks throttle to 12-18W split across all ports — useful but slow for multiple fast-charge devices.
- Pass-through charging: Pass-through lets you charge the power bank and your device simultaneously from one wall outlet. Useful for overnight hotel charging — plug in the bank, connect your phone to the bank, both charge.
- Display accuracy: LED indicator lights show rough capacity (25%/50%/75%/100%). A percentage display is more precise and better for knowing exactly how much reserve remains before leaving for a long day.
Our Top Picks
Anker 737 Power Bank 24,000 mAh
140W total output (87W USB-C PD output charges a MacBook Pro), 24,000 mAh with the most accurate capacity of any bank tested, a dynamic display showing input and output wattage and remaining percentage, and simultaneous triple-device charging. The best high-capacity power bank for users who need laptop charging speed from a portable bank.
INIU 20000 mAh 65W USB-C Power Bank
65W USB-C PD output, 20,000 mAh rated capacity (verified within 5% in testing), three simultaneous charge ports, and a display showing exact percentage remaining. At $39 for 65W laptop-capable charging and 20,000 mAh, the INIU delivers the best mAh-per-dollar of any quality power bank available.
Anker 521 Power Bank 5,000 mAh
Credit card size, 12W USB-C output, foldable wall plug built in (charges itself without a separate cable), 5,000 mAh for 1 full iPhone charge. The most elegant solution for light travelers who want emergency phone backup without carrying a significant bag weight. The built-in plug is the feature that makes this the best compact option.
Jackery Explorer 240 Portable Power Station
240Wh capacity (far exceeding TSA limits for flights), 200W AC outlet output, USB-A and USB-C ports, and solar panel compatibility. Not a pocket-sized power bank — this is a portable power station for camping, van life, and emergency home power backup. Charges phones 20+ times and runs small appliances.
Bottom line: The Anker 737 is the best high-performance power bank for laptop charging with 140W output. The INIU 20000 mAh at $39 is the best value for most travelers. The Anker 521 is the most convenient compact option for emergency phone backup. For camping and off-grid use, the Jackery Explorer 240 is in a different category entirely.
Frequently Asked Questions
What mAh power bank do I need?
For a single phone: 5,000-10,000 mAh provides 1-2 full charges. For multiple devices or day trips: 20,000 mAh is the practical all-day capacity. For laptop charging: you need both high mAh (20,000+) and high USB-C PD wattage (45-100W). Match to your longest expected time away from an outlet.
Can you bring a power bank on a plane?
Power banks up to 100Wh (approximately 26,800 mAh at 3.7V) are allowed in carry-on bags without airline approval. 100-160Wh requires airline approval. Above 160Wh is prohibited. The Anker 737 at 24,000 mAh (88.8Wh) is comfortably within the standard carry-on limit.
How long does a 20,000 mAh power bank take to charge?
A 20,000 mAh power bank via a standard 5W USB charger takes 10-12 hours to fully recharge. With a 65W USB-C PD wall charger, quality banks like the INIU 20000 recharge in 2-3 hours. Fast wall charging of the power bank itself is one of the most underrated features to look for — a bank you cannot recharge quickly between uses is frustrating.
