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Never run out of battery again. SmartGear Outlet's power bank collection covers everything from slim 5,000 mAh pocket chargers for daily commutes to rugged 25,000 mAh behemoths that can charge a MacBook Pro. All our portable chargers support USB-C Power Delivery for fast charging, and every order ships free within the UK.
A typical smartphone has a 4,500–5,000 mAh battery. A 10,000 mAh power bank gives roughly two full charges; a 20,000 mAh unit gives four. If you need to charge a laptop, look for 25,000 mAh models with 65 W+ output. Capacity matters, but so does output wattage — read our 2026 power bank buying guide for the full breakdown.
Modern power banks with USB-C PD can charge an iPhone 16 from 0 to 50% in around 25 minutes — the same speed as a wall charger. Look for models advertising 30 W output or higher for phones, and 65–100 W for laptops. Our high-capacity power bank roundup compares the fastest options.
UK airlines allow power banks up to 100 Wh (approximately 27,000 mAh at 3.7 V) in carry-on luggage. Power banks between 100–160 Wh require airline approval. They're never allowed in checked bags. Check our detailed airline power bank rules UK guide before you fly.
Phones need 20–30 W, tablets need 30–45 W, and laptops need 65 W+. Don't overspend on 100 W output if you only charge phones.
A 20,000 mAh power bank with only 10 W input takes over 8 hours to recharge itself. Look for 30 W+ input to refill in under 3 hours.
10,000 mAh models weigh around 200 g and fit in a pocket. 20,000 mAh units weigh 350–500 g and suit a bag. Our 145 W vs 200 W comparison covers the trade-offs at the top end.
Approximately 3.5–4 full charges for a typical 5,000 mAh smartphone, accounting for conversion losses (roughly 15–20%).
Yes, if the power bank supports USB-C PD at 45 W or higher. Most ultrabooks charge well at 65 W; gaming laptops may need 100 W models.
Yes — up to 100 Wh (≈27,000 mAh) in carry-on with no special approval. Between 100–160 Wh needs airline permission. See our airline rules guide.
Quality lithium-polymer power banks retain 80% capacity after 500+ charge cycles, which is typically 2–3 years of daily use.