In our increasingly mobile world, a reliable power bank is essential. Whether you're commuting on the Tube, travelling abroad, or working from coffee shops, running out of battery is not an option.
We've tested the top power banks available on Amazon UK to help you find the perfect portable charger for your devices and lifestyle.
🏆 Best Overall: Anker PowerCore 20,000mAh
🔋 Anker PowerCore 20,000mAh Best Overall
Anker has earned its reputation as the king of power banks, and the PowerCore 20,000mAh is their flagship model for good reason.
Key Features:
- Massive 20,000mAh Capacity: Charges an iPhone 15 over 4 times
- Dual USB Ports: Charge two devices simultaneously
- PowerIQ Technology: Fast charging for any device
- TSA Approved: Safe for air travel in hand luggage
- Reliable Brand: Anker's excellent customer service
- LED Power Indicator: Know exactly how much charge remains
Capacity Guide: 20,000mAh can charge:
- iPhone 15: ~4.5 charges
- Samsung Galaxy S24: ~3.5 charges
- iPad Pro: ~1.5 charges
- MacBook Air: ~0.8 charges
💼 Best for Travel: Compact 10,000mAh Options
Not everyone needs 20,000mAh. For daily commuting and light use, a 10,000mAh power bank is more portable and often sufficient.
🔋 Anker PowerCore Slim 10,000mAh Best Portable
- Ultra-slim design (slimmer than most phones)
- Lightweight at just 212g
- USB-C and USB-A ports
- Fits easily in pocket or bag
- 2-3 phone charges per cycle
⚡ What to Look For in a Power Bank
1. Capacity (mAh)
- 5,000-10,000mAh: Daily commuting, 1-2 phone charges
- 20,000mAh: Multi-day trips, 4-5 phone charges
- 30,000mAh+: Extended travel, laptop charging
2. Ports
- USB-C: Modern standard, faster charging
- USB-A: Legacy devices, still common
- Multiple ports: Charge several devices at once
3. Fast Charging
- Power Delivery (PD): Fast charging for phones and laptops
- Quick Charge (QC): Qualcomm's fast charging tech
- PowerIQ: Anker's intelligent charging
4. Size & Weight
Balance capacity with portability. 20,000mAh power banks are still pocketable but noticeably heavier than 10,000mAh options.
✈️ Air Travel with Power Banks
For UK travellers, here are the rules:
- Power banks must be in hand luggage, NOT checked baggage
- Maximum 100Wh (about 27,000mAh) without airline approval
- 20,000mAh (~74Wh) is safe for all airlines
- Only carry power banks from reputable brands
🔋 How to Make Your Power Bank Last Longer
- Don't drain to 0%: Recharge when it hits 20-30%
- Store at 50%: If not using for weeks, keep half charged
- Avoid extreme temperatures: Don't leave in hot cars
- Use quality cables: Cheap cables reduce efficiency
- Unplug when full: Don't overcharge your devices
Stay Charged Wherever You Go
All the power banks featured are available on Amazon UK with Prime delivery. Never run out of battery again!
Shop Power Banks on Amazon📝 Final Thoughts
A good power bank is an essential accessory in 2025. For most people, the Anker PowerCore 20,000mAh offers the best balance of capacity, reliability, and value. It'll keep your devices powered through the longest days and multi-day trips.
For lighter users, a 10,000mAh option is more portable and still provides multiple charges. Whatever your needs, invest in a quality brand - cheap power banks can be unsafe and often fail when you need them most.