Whether you're commuting, travelling, or just spending a long day away from a plug socket, a portable phone charger (power bank) is one of the most useful gadgets you can own. But with hundreds of options on the market, it can be hard to know where to start.
This guide covers what to look for and highlights the best options available right now from EKN Marketplace.
What to Look for in a Portable Charger
Capacity (mAh)
The higher the mAh rating, the more charges you'll get. A typical smartphone battery is around 3,000–5,000mAh:
- 5,000mAh — roughly 1 full charge. Slim and pocket-friendly.
- 10,000mAh — 2–3 full charges. The sweet spot for most people.
- 20,000mAh — 4–6 full charges. Great for travel or multiple devices.
Charging Speed
Look for USB-C Power Delivery (PD) or Quick Charge 3.0/4.0 if you want fast charging. Standard 5W chargers can take hours to top up a modern phone.
Ports
A good power bank should have at least one USB-C and one USB-A port so you can charge two devices simultaneously.
Our Top Picks
Browse our full range of phone accessories and power banks — all shipped directly to the UK with buyer protection.
Tips for Getting the Most from Your Power Bank
- Charge it fully before first use.
- Don't leave it at 0% for extended periods — store at around 50% charge.
- USB-C to USB-C cables charge both ways, so you can charge the power bank faster too.
- Airlines allow power banks up to 100Wh (around 27,000mAh) in carry-on luggage.
Frequently Asked Questions
Can I take a power bank on a plane in the UK?
Yes — power banks up to 100Wh (roughly 27,000mAh at 3.7V) are permitted in carry-on bags on most UK and EU airlines. They cannot go in checked luggage.
How long does a 10,000mAh power bank last?
Accounting for conversion losses, a 10,000mAh bank will typically deliver around 6,500–7,000mAh of usable charge — enough for 1.5–2 full charges of most smartphones.
Is fast charging worth it?
Yes, if your phone supports it. A 22.5W power bank can charge a compatible phone from 0–50% in about 30 minutes versus 90+ minutes with a 5W standard charger.
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