A portable power bank is one of the most practical gadgets you can own — but with so many options on the market, choosing the right one can feel overwhelming. Capacity, charging speed, size, and wireless vs wired all matter. This guide cuts through the noise so you can pick the right power bank for your needs.
1. How Much Capacity Do You Actually Need?
Power bank capacity is measured in milliamp-hours (mAh). Here's a quick rule of thumb:
- 5,000–7,000 mAh — One full charge for most smartphones. Ideal if you want something slim and pocketable.
- 10,000 mAh — Two to three full charges. The sweet spot for most travellers and commuters.
- 20,000+ mAh — Multiple charges for multiple devices. Best for long trips or charging tablets.
Keep in mind that real-world output is typically 70–80% of the rated capacity due to energy conversion losses, so factor that in when comparing specs.
2. Wired vs Wireless: Which Is Right for You?
Traditional power banks charge via a cable — reliable and universally compatible, but you need to carry the cable. Wireless power banks eliminate that friction entirely.
The Magnetic Wireless Power Bank snaps directly onto the back of your iPhone using MagSafe-compatible magnets, so it charges while you use your phone — no cable required. It's the most convenient option for iPhone users who want to stay powered up on the move.
For travel, the 3-in-1 Travel Wireless Charger Stand doubles as both a travel charger and a desk stand, making it a versatile companion for trips.
3. Size and Weight: Pocketable vs High Capacity
There's always a trade-off between capacity and portability. A 20,000 mAh bank will keep you charged for days but won't fit in your jeans pocket. For daily carry, a slim 5,000–10,000 mAh wireless bank is the better choice. For travel, prioritise capacity and look for a model with pass-through charging (charges itself and your device simultaneously).
4. Charging Speed: Look for Fast Charge Support
Not all power banks charge at the same speed. Look for support for USB Power Delivery (PD) or Quick Charge if you want to top up your devices quickly. Wireless charging speeds on power banks typically range from 5W to 15W — Qi2-compatible banks deliver the fastest wireless speeds.
5. How Many Ports Do You Need?
If you're charging multiple devices simultaneously, look for a bank with at least two output ports — ideally a USB-C PD port and a USB-A port. This lets you charge a phone and earbuds at the same time without needing a second bank.
Our Recommendation
For most people, the Magnetic Wireless Power Bank hits the ideal balance of convenience, speed, and portability. iPhone users in particular will appreciate the magnetic snap-on design that means one less cable to carry.
Travelling soon? The 3-in-1 Travel Wireless Charger Stand is a smart all-in-one solution for keeping your devices charged wherever you are. Browse our full Travel Tech collection for more.
The Bottom Line
The best power bank is the one you'll actually carry. Prioritise wireless charging if you're an iPhone user, choose capacity based on your typical day, and don't overlook charging speed. A good power bank pays for itself the first time it saves you from a dead battery at the worst possible moment.
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