Anker Prime Power Bank

At 99.54Wh, this is among the largest capacities available while staying under the 100Wh airline carry-on limit, a deliberate design target rather than a coincidence. In real terms, Anker states this charges a 13-inch MacBook Air (M2) about 1.28 times or an iPhone 14 roughly 4.67 times. As with any power bank, expect real-world delivered charge to run somewhat below the rated capacity due to voltage conversion losses; independent testing has estimated actual delivered energy at roughly 85% of the rated 99.5Wh figure, which is a normal and expected margin for this category, not a defect.

This is the standout spec on this unit: a single USB-C port can deliver up to 140W on its own, enough to fast-charge most laptops including a 16-inch MacBook Pro to 50% in about 28 minutes. Reaching the full 250W total requires all three ports active simultaneously, at which point the split becomes 140W on USB-C1, 92W on USB-C2, and 18W on USB-A, still enough to fast-charge a laptop, a tablet, and a phone all at once without any of them settling for a slow trickle charge. Power Delivery 3.1 is the standard behind the high-wattage USB-C ports; check that your specific laptop supports PD charging at this wattage before assuming full-speed charging, since not every USB-C laptop does.

Two USB-C ports plus one USB-A port, three devices at once. Unlike many power banks that throttle hard once a second or third device joins in, this unit's per-port wattage numbers above already account for all three ports being active together, meaning what's advertised is closer to what's actually delivered under real multi-device use rather than a best-case single-port number.

Anker describes the form factor as roughly soda-can sized, notably compact given the 27,650mAh cell count inside, built from seven smaller cells rather than fewer larger ones. The front carries a genuinely detailed LCD display, a step up from the simple LED dot indicators found on cheaper power banks, showing live input/output wattage per port and estimated time to a full charge or full recharge. A magnetic connector on the underside pairs with Anker's separately-sold charging base and stand.

Using both USB-C ports simultaneously for input, this unit accepts up to 170W and recharges fully in around 37 minutes, among the fastest recharge times available in this capacity class. Using a single charger instead will take meaningfully longer; check which of your existing chargers, if any, can supply enough combined wattage across two ports to hit the full 170W input figure.

This is Anker's flagship, sitting above the Anker 737 (PowerCore 24K) covered elsewhere on this site in both capacity (27,650mAh vs 24,000mAh) and total output (250W vs 140W), at a real price premium. Against other 250W-class competitors like UGREEN's Nexode line, the differentiator Anker leans on is the display and companion app; the underlying charging capability across top-tier power banks in this price bracket is broadly similar.

Laptop-carrying travelers and remote workers. Genuinely replaces a laptop charger on the road, not just a phone charger with extra capacity.

Anyone charging multiple devices at once regularly. The three-port simultaneous output holds up under real multi-device load rather than throttling hard.

Frequent flyers. Sized specifically to clear the 100Wh airline carry-on threshold.

Not for anyone who only needs to charge a phone. The 250W capability and premium display go unused if a phone is the only thing you're charging; a smaller, cheaper power bank covers that case just as well.

Not for the most weight-conscious travelers. The seven-cell design keeps this compact for its capacity, but it's still a noticeably denser, heavier object than a basic 10,000mAh phone charger.