9 picks compared
Best power bank UK
Our pick: Anker Zolo Power Bank 20,000mAh 45W (dual built-in USB-C cables). Four charges for an iPhone 16, cables built right in.
2 buying guides · 15 picks compared
Best phone accessories and eSIMs UK
Power banks and travel eSIMs that keep your phone going, at home and abroad, with the exact model or plan and the catch on each one.
Phones buying guides
Affiliate6 picks compared
Best eSIM for travel 2026 (UK travellers)
Our pick: Airalo eSIM. The widest choice of countries in one easy app.
Phones basics
What is an eSIM?
An eSIM is a SIM built into your phone. You add a plan by scanning a QR code, with no plastic card to swap. Most recent iPhones and Android flagships support it.
How big a power bank do I need?
A 10,000mAh power bank tops up most phones about twice. Go for 20,000mAh for long trips or a laptop that charges over USB-C.