Best Power Bank for Laptop UK 2026 — Charge MacBook & Dell on the Go

Yes. Any USB-C power bank with USB Power Delivery (PD) output of 45W or higher can charge a laptop. Modern MacBooks, Dell XPS, HP Spectre, Lenovo ThinkPad, and most Windows ultrabooks support USB-C PD charging. The power bank must match or exceed your laptop's minimum wattage requirement — for example, a MacBook Air needs at least 30W, while a MacBook Pro 16" needs 140W for full-speed charging. A lower-wattage power bank will still charge your laptop, but more slowly, and may not keep up if you're using the laptop under heavy load.

It depends on your laptop. MacBook Air M3/M4 needs 30W minimum (67W for full speed). MacBook Pro 14" needs 96W. MacBook Pro 16" needs 140W. Dell XPS 13/15 needs 45–65W. HP Spectre needs 65W. Lenovo ThinkPad needs 45–65W. For best results, choose a power bank rated at or above your laptop's charger wattage. A 200W power bank like the UGREEN 25000mAh covers every laptop on the market, while a 100W+ model handles everything except the MacBook Pro 16" at full speed.

A 25000mAh (90Wh) power bank provides roughly 0.8–1.2 full charges of a MacBook Air (52.6Wh battery), or about 0.6–0.9 charges of a MacBook Pro 14" (72.4Wh battery). Energy is lost during voltage conversion (typically 15–20%), so real-world capacity is lower than the theoretical maximum. For a Dell XPS 13 (55Wh battery), expect about 1 full charge. The UGREEN 25000mAh 200W is airline-safe at exactly 90Wh — the maximum allowed on flights without declaration.

Yes, with restrictions. UK and international aviation rules allow power banks up to 100Wh (approximately 27000mAh) in carry-on luggage without declaration. Power banks between 100Wh and 160Wh require airline approval. Power banks over 160Wh are banned on flights. The UGREEN 25000mAh 200W is rated at exactly 90Wh — safely under the 100Wh limit and allowed on all flights without any special approval needed. Power banks must always go in carry-on, never checked luggage.

Yes, you can use your laptop while charging from a USB-C power bank — this is called pass-through charging. However, if the power bank's output wattage is lower than your laptop's power consumption under load, the battery will drain slowly despite being plugged in. For comfortable use while charging, choose a power bank that matches your laptop's charger wattage. A 200W power bank will keep any laptop running and charging simultaneously, even under heavy workloads like video editing.

The wattage rating determines charging speed and laptop compatibility. A 100W power bank charges most ultrabooks (MacBook Air, Dell XPS 13, ThinkPad) at full speed, but cannot fully power a MacBook Pro 16" (requires 140W). A 200W power bank charges every laptop at maximum speed, including high-performance machines and gaming laptops. Both can charge phones and tablets. The 200W model typically costs £10–15 more but is genuinely future-proof — as laptops get more powerful, their charging requirements increase. If budget allows, 200W is the better long-term investment.