Short answer: 10,000 mAh is the right capacity for almost all travel — two to three full phone charges, comfortably under airline limits, and light enough to carry all day. Magnetic MagSafe-compatible models start at $30.99 here. Everything below links to a real product with its current price.
How much capacity do you actually need?
- 5,000 mAh — roughly one full phone charge. Pocketable, good as an emergency top-up.
- 10,000 mAh — two to three phone charges. The sweet spot for a day out, a flight, or a weekend.
- 20,000 mAh and above — multiple devices or several days off-grid. Heavier, and slower to recharge itself.
Real-world output is always below the rated figure — voltage conversion loses roughly 20–35%. A 10,000 mAh bank delivers around 6,500–7,500 mAh to your phone in practice.
Compare our magnetic power banks
| Model | Price from | Capacity options | Output | Notes |
|---|---|---|---|---|
| MagSafe Magnetic Power Bank 15W | $30.99 | 5,000 mAh | 15W | Cheapest magnetic option, USB-C |
| 10000mAh Magnetic Power Bank, Qi2 | $34.99 | 5,000 / 10,000 mAh | 20W PD, Qi2 | Best all-round; $39.99 for 10,000 mAh |
| MagSafe Magnetic Power Bank 20W, slim | $37.99 | 10,000 mAh+ | 20W | Slim form factor |
| Thin Magnetic 5000mAh Power Bank | $52.99 | 5,000 mAh | 20W | Thinnest, premium price |
Prices are the lowest variant price at time of writing. A note on capacity claims: some listings in this category quote very large headline figures that do not match the actual variant capacities. Buy on the variant capacity you select, not the headline number — that applies across the whole market, not just here.
What to look for
- Output wattage — 15W is fine overnight; 20W PD matters when you are charging in a 40-minute airport gap. Qi2 gives proper magnetic alignment rather than magnets bolted onto plain Qi.
- Weight — under 200 g for something you carry all day. A 20,000 mAh bank is typically 350–400 g, which you notice by evening.
- Ports — USB-C in and out is the minimum. A second port lets you charge phone and earbuds together.
- Magnetic versus cabled — magnetic banks stick to the back of a MagSafe-compatible phone so you can keep using it while charging. They charge more slowly than a cable and generate more heat. Bring a cable too.
- Pass-through charging — lets you charge the bank and phone from one wall socket. Useful in hotels with one accessible outlet.
Airline rules
Power banks must travel in carry-on baggage, never in checked luggage — this is a firm rule across essentially all airlines because lithium cells must be accessible if they overheat. Capacity limits are expressed in watt-hours: most carriers allow up to 100 Wh without approval, which is roughly 27,000 mAh at 3.7 V. Between 100 Wh and 160 Wh you generally need airline approval. Every power bank listed above sits well under the 100 Wh threshold.
Rules vary by carrier and several airlines tightened restrictions on using power banks in flight during 2025. Check your specific airline before flying.
Our top picks
- Best overall: 10000mAh Magnetic Power Bank, Qi2, 20W PD — $39.99 for the 10,000 mAh version. Qi2 and 20W PD at this price is the strongest combination we carry.
- Best budget: MagSafe Magnetic Power Bank 15W — $30.99. One full charge, pocket-sized.
- Best slim: MagSafe Magnetic Power Bank 20W, slim — from $37.99.
Travel tips
- Charge the bank the night before, not the morning of — 10,000 mAh takes two to three hours to fill.
- Keep it in your carry-on, always.
- Use USB-C to USB-C for the fastest speeds; USB-A cables cap out much lower.
- Magnetic charging heats the phone. In a hot car or in direct sun, use the cable instead.
- Label it if travelling in a group. They are indistinguishable.
Frequently asked questions
How many phone charges does 10,000 mAh give?
Two to three for a typical smartphone. Conversion losses mean you get roughly 6,500–7,500 mAh of usable output rather than the full 10,000.
Can I take a power bank on a plane?
Yes, in carry-on only. Most airlines allow up to 100 Wh (about 27,000 mAh at 3.7 V) without approval. Never pack one in checked luggage.
Is magnetic wireless charging worth it?
For convenience, yes — you can keep using the phone while it charges, with no cable. It is slower and warmer than wired charging, so carry a cable for when you need speed.
What does Qi2 mean?
Qi2 is a wireless charging standard with magnetic alignment built in, rather than magnets added to a plain Qi charger. Alignment is more reliable and charging is more consistent. Worth the small premium on a recent phone.
Should I trust very high mAh claims?
No. Capacity is constrained by physics and cell size — a pocket-sized bank cannot hold 200,000 mAh. Check the capacity of the specific variant you are buying and treat headline figures far above 30,000 mAh on a slim device as marketing.
Browse the full Power Banks & Chargers collection. Free standard shipping on orders over $50.