Power Banks & Portable Chargers

Choose a power bank based on the devices you carry and how long you spend away from a socket. A 10,000mAh model is often a practical choice for commuting and phone top-ups. A 20,000mAh model offers more reserve capacity for longer days or several devices, while 25,000mAh models may suit laptops when they also provide sufficient output wattage. Higher capacity usually means greater weight and bulk. If portability matters most, browse our slim power banks. Check both capacity and charging specifications before buying.

The number of full charges depends on your phone's battery size, the power bank's stored energy and efficiency losses. As a rough guide, a 10,000mAh power bank may recharge many modern smartphones around once or twice, while a 20,000mAh model can often provide several charges. These are estimates, not guarantees: voltage conversion, heat, charging speed and using the phone during charging all affect the result. Wireless charging may deliver less usable energy than a comparable wired connection. See our power bank capacity comparison for more guidance.

These measurements describe different things. Milliampere-hours (mAh) indicate battery charge capacity, while watt-hours (Wh) express stored energy and account for voltage. Charging wattage (W) describes how quickly power can be delivered or received, not how much energy the battery stores. A 25,000mAh power bank is not necessarily faster than a 10,000mAh one; compare their USB-C output ratings separately. Watt-hours are particularly important when checking airline limits. To understand the calculation, read our guide to converting Wh and mAh. Always use the product's stated specifications.

Yes, provided the power bank supports USB-C Power Delivery at a suitable output for your laptop, and the laptop accepts charging through that connection. Check the maximum output of the individual USB-C port, not just the combined output advertised for all ports. A lower-powered bank might charge slowly, especially while the laptop is in use, while more demanding models may need considerably more wattage. Use an appropriately rated USB-C cable and confirm laptop compatibility before purchasing. Explore our high-capacity power banks if you need longer running time or laptop-focused options.

Recharge time depends on battery capacity, the power bank's maximum input wattage, the USB-C wall charger's output and the cable used. A larger battery usually takes longer to refill, but a model supporting higher USB-C PD input can recharge much faster with a compatible adapter. A 100W wall charger will not necessarily recharge a power bank at 100W if its input is limited to less. Charging also slows near full capacity, so quoted times are approximate. Compare compatible USB-C chargers and consult our power bank recharging guide before choosing your setup.

Choose a magnetic power bank if you value cable-free convenience and your phone or case supports the required magnetic alignment and wireless charging standard. A wired USB-C model is often a more flexible choice for charging tablets, laptops or several different devices, and it generally transfers energy more efficiently. Magnetic charging speed varies by model, so Qi2 15W and Qi2 25W should not be treated as interchangeable or guaranteed on every phone. Compare capacity, heat, portability and device compatibility. Browse our wireless and magnetic power banks to explore that option.

Under current UK Civil Aviation Authority guidance, power banks must travel in carry-on baggage, not checked luggage, with a maximum of two per person. Lithium-ion power banks up to 100Wh generally need no airline approval; those above 100Wh and up to 160Wh require operator approval. They must be protected against short circuits and must not be recharged during the flight. The CAA also advises against using them to charge devices on board. Check your power bank's Wh rating and your airline's rules before travelling, especially with larger-capacity models.

Keep your power bank away from extreme heat, moisture and physical damage, and use a compatible charging cable and adapter. Avoid leaving it in a hot car or storing it completely discharged for long periods. If you will not use it for some time, follow the manufacturer's storage guidance and check its charge periodically. Battery capacity gradually decreases with age and repeated use, so no fixed lifespan applies to every model. Stop using a power bank that becomes swollen, damaged, unusually hot or behaves abnormally. Do not attempt to open or repair its battery yourself.

If you're looking for a power bank black friday deal, visit the UGREEN UK Black Friday page to see which offers are available during the campaign. Depending on the promotion, selected portable chargers, magnetic power banks or higher-capacity models may be included. Before buying, compare battery capacity, USB-C output power, weight and compatibility with your devices rather than relying on the discount alone. Prices, eligible products, availability and promotional dates can change. Check the campaign page's current terms and product listings before placing your order.