16,952 reviews at 4.4 stars. The Anker 737 packs 140W output and 24,000mAh into a power bank that charges a MacBook Pro at full speed. Here's why it's the benchmark.

What Makes the Anker 737 Different

Most power banks are defined by capacity. The Anker 737 is defined by power: its 140W maximum output through a single USB-C port is the highest-wattage output available in any commercial power bank. This matters because 140W is the full-speed charging rate for devices that support it — a MacBook Pro 14-inch charges at full speed from the 737 (it charges at the same rate as the official Apple 140W charger), an M1 iPad Pro charges at full speed, and a modern Android flagship phone with 65W+ charging hits its maximum supported charge rate.

At £110 and 16,952 reviews at 4.4 stars, the Anker 737 is the most extensively reviewed high-power-output power bank on Amazon UK. The review depth across thousands of verified purchasers reduces the uncertainty that characterises newer or less-tested alternatives.

140W Output: What Devices Actually Benefit

Not all devices use 140W input. Understanding which devices benefit from the 737's output versus a standard 65W power bank:

Full 140W benefit: MacBook Pro 14-inch (M3 Pro/Max), MacBook Pro 16-inch (requires 140W for full-speed), Razer Blade laptops, ASUS ROG gaming laptops.

65W benefit (still faster than most power banks): MacBook Air (M1/M2), MacBook Pro 13-inch, Dell XPS 13, ThinkPad X1 Carbon, Samsung Galaxy Book.

Standard fast charging: iPhone 15 Pro (27W max), Samsung Galaxy S25 (45W max), iPad Pro, most Android smartphones (20–65W depending on model).

If your primary use case is phone and tablet charging, the 737's 140W peak output provides no additional benefit over a 65W alternative — you're paying the 737 premium for laptop charging. If you have a MacBook Pro 14/16 or similar high-draw laptop and need to charge it from a power bank at meaningful speed, the 737 is the correct tool.

24,000mAh Capacity

The energy stored in the 737 is sufficient for approximately: 3–4 full iPhone 15 Pro charges; 2–3 Samsung Galaxy S25 charges; approximately 60–70% of a MacBook Pro 14-inch from flat (the conversion from mAh to usable capacity accounts for conversion losses and voltage stepping). For multi-day travel without mains charging, the 24,000mAh reserve covers a working laptop user through 2–3 days of supplemental charging between hotel stays.

Airline carry-on regulations limit power bank capacity to 100Wh (approximately 27,000mAh at 3.7V). The Anker 737 at 24,000mAh converts to approximately 88.8Wh — within the 100Wh airline limit, confirming it is legal for carry-on travel on most airlines. Always verify with your specific airline, as policies vary and enforcement occasionally differs from stated policy.

65W Input Charging

The 737 recharges itself at up to 65W via USB-C — from flat to full in approximately 1.5 hours. This is significantly faster than power banks charged via legacy Micro-USB or 18W USB-C charging (which would take 5–6 hours). The fast self-charging means the 737 can recover meaningfully in a short hotel or café stop rather than requiring overnight charging to be useful again.

Digital Display

The screen on the 737 shows remaining capacity as a precise percentage (not the four-dot LED common on cheaper power banks) and displays current input/output wattage in real time. Seeing "78W out" while charging a laptop confirms the cable and device are negotiating a high-power charge session; "27W out" while charging a phone confirms the phone is the wattage limitation rather than the power bank. This transparency is useful for understanding device-level behaviour without additional testing tools.

Three Ports

Two USB-C ports (one at full 140W when used alone, or shared when both active) and one USB-A port allow simultaneous charging of three devices. The USB-A port delivers 12W for legacy device compatibility — older cables, accessories, and devices that use the USB-A format are supported without an adaptor. When charging three devices simultaneously, power is distributed across the total bank capacity rather than each port maximising independently.

Weight Consideration

At 642g, the Anker 737 is a substantial carry item — heavier than a litre bottle of water. It's not a pocket power bank; it's a bag power bank. For those who already carry a laptop bag or backpack, the weight adds to existing bag load without requiring new carriage. For those who travel extremely light (crossbody bag only), the weight may be a consideration against the capacity.

Verdict

The Anker 737 is the power bank for laptop users who need meaningful fast charging on the move. Its 140W output is the benchmark in the category, the 24,000mAh capacity covers multi-day use, and the 16,952-review track record at 4.4 stars is the most extensive validation in its class. At £110 it's priced as a premium product — because it is one, for the specific use case it serves best.

Rating: 4.4/5 — Benchmark 140W output, excellent capacity, real-time digital display, and the most-reviewed high-power power bank in the UK. Weight and cost are appropriate trade-offs for the capability; phone-only users won't need the power headroom.

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