Portable power banks have become increasingly capable, offering everything from pocket-sized emergency chargers to high-capacity powerhouses that can keep laptops, tablets and multiple devices running. With faster charging speeds, larger capacities and increasingly compact designs, a selection of portable power banks has been put to the test.
Ugreen MagFlow Pro: Liquid cooling for wireless charging
One thing that most power banks have in common is that they can run hot, especially when charging wirelessly. Ugreen has tackled this with its flagship MagFlow Pro, which brings micro-pump liquid cooling to a portable power bank for the first time.
Its CryoPulse system combines an active micro-pump, VC copper heat-spreading foil, and a separate internal layout to circulate coolant directly at the heat source, resulting in peak temperatures up to 10°C lower than the norm. A transparent window displays coolant circulation in real time, turning thermal performance into a visible design element.
The 10,000mAh power bank delivers Qi2 25W wireless charging and up to 45W wired output via a built-in USB-C cable, powering an iPhone 17 Pro Max to 50% wirelessly in approximately 40 minutes and to 65% via cable in 30 minutes. Ugreen MagFlow Pro is currently available for £89.98 from Amazon.
Belkin UltraCharge Pro: Ultra-slim magnetic charger
Slimness is the focus of the UltraCharge Pro. The 5,000mAh Qi2-certified magnetic charger is just 8.8mm thin and no larger than a credit card, meaning it can be attached to the back of a phone without being noticeable.
Built using Belkin's semi-solid-state battery technology, it offers a more durable and compact approach to portable charging, with features including 15W magnetic wireless charging, 22.5W USB-C wired charging, and pass-through charging to power a phone while recharging the bank. Belkin promises up to 3x longer battery life, with a design engineered to retain capacity across 1,000 charging cycles. Belkin UltraCharge Pro is available for £69.99 from Argos.
CUKTECH 15 Air: Slim 15,000mAh power bank
Thinner and lighter than most 10,000mAh power banks, the 15 Air slips easily into a laptop sleeve, backpack, or cargo pocket. The 15,000mAh capacity is up to the job of all-day use, with enough power to charge an iPhone 17 Pro Max about 1.6 times or a Samsung S25 Ultra about 2.2 times.
It's mighty enough for a laptop as well, with 65W fast charging that can charge a MacBook Air M3 to 48% or an iPhone 17 Pro Max to 67% in about 30 minutes. Users can also power three devices at once thanks to the two USB-C and one USB-A ports. The TFT screen allows checking battery level, input/output power, and estimated recharge time at a glance. CUKTECH 15 Air is currently available for £42.49 from Amazon.
Krafted Edge: Laptop charging with replaceable battery
If you really want to make sure your laptop makes it through the day, then the Krafted Edge is up to the job. It combines ultra-slim engineering with laptop charging without the traditional 'brick' footprint. The Edge, at just 12mm thick, is designed to slip under your laptop, so you don't have to worry about finding space for it.
The 20,000mAh device delivers 65W output and enough capacity to take most laptops from empty to full, and have power to spare. You also get a second USB-C port and two USB-A ports so you can charge phones, tablets and accessories alongside your laptop. It also has a modular, replaceable battery system, which means when the cells eventually wear out, you can replace them while keeping the existing housing and hardware in use. Krafted Edge is available for £149.99 from the Krafted website.
Aulumu M10: Compact multi-device charger
The compact 10,000mAh power solution is designed for multi-device charging with advanced thermal management and a premium geometric design. The M10 has been engineered as an all-in-one charging companion that supports phones, earbuds and Apple Watch devices through a combination of MagSafe wireless charging, USB-C Power Delivery and an integrated Apple Watch charging pad.
It weighs only 248 g, making it suitable for travel and daily carry, and includes a built-in USB-C charging cable that doubles as a lanyard. The device also features a pixel-style power indicator that displays battery level and charging status at a glance. The aluminium alloy panel with an anodised finish and an asymmetrical geometric cut design not only looks good, but is ready for all those bumps and drops. Aulumu M10 is available for £79.98 via Amazon.
