Anker Nano Power Bank 10000mAh review
By Tom Calder
A compact, well-made power bank from a brand with a strong safety record, and the built-in USB-C cable means there's one less thing to lose from a grab bag. The 10,000mAh capacity is enough for roughly one-and-a-half to two phone charges, so treat it as a sensible everyday-and-short-outage top-up rather than a way to ride out a long blackout.
- Best for
- Keeping a phone and small devices topped up during a short power cut or away from the mains.
- Skip it if
- You want to keep devices running through a multi-day outage or power anything larger than phones…
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Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.
What we like
- Built-in USB-C cable plus separate USB-C and USB-A ports, so you can charge without hunting for a lead
- Genuinely pocket-sized and light, which suits a grab bag or bedside drawer
- 30W output charges a modern phone quickly and can trickle a small tablet
- Trusted brand with a good reputation for battery safety and honest capacity
Worth knowing
- 10,000mAh only covers around one-and-a-half to two phone charges, not larger devices for long
- The built-in cable is USB-C only, so older Lightning or micro-USB kit needs the separate ports and your own lead
Out of stock when we checked: our alternatives
Closest in size first, then by our score. None of them was showing out of stock when we last checked.
Best for Keeping phones and tablets topped up during a power cut or a long day away from the mains.
Read the review →Best for Keeping a household's phones and a tablet topped up through a power cut, in a bank small enough to carry every day.
Best for Keeping phones and a USB-C laptop going through a long power cut, with no cable to forget.
as of 2 Nov 2026, 16:07 GMT · Details
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Our review
Anker's Nano Power Bank is a 215g, 10,000mAh bank with a built-in USB-C cable, a second USB-C port and a USB-A port, giving 30W from one port. It is a phone bank for a pocket or a grab bag: about two phone charges, with nothing to forget. For a laptop or several days of cuts you want a bigger one.
What it is
Anker's support page lists model A1259 with a built-in USB-C cable, a USB-C port and a USB-A port, a maximum of 30W from a single port and 24W shared across several, at 215g and 104 by 52 by 26mm. It has a row of charge lights rather than a screen. The built-in cable both charges the bank and charges your phone, so a bank in a bag is never without a lead. Anker's page gives no watt-hour figure; 10,000mAh at the usual 3.6V cell voltage is about 36Wh, well inside the limit for cabin baggage.
What it will charge
A 10,000mAh bank gives back roughly 6,000 to 7,000mAh at phone voltage after conversion losses, which is about two full charges of a typical phone or one of a large one, and a top-up for earbuds or a watch. The 30W port charges a modern phone at close to its fastest rate. It will not run a laptop, and it is too small to keep a phone going through several days of power cuts on its own, which is where a 20,000mAh or larger bank earns its weight.
In a cut, the trick is to charge the phone from the bank in short top-ups rather than to full each time, and to put the phone on low-power mode, which stretches a 10,000mAh bank across two or three days for one person. Keep the bank itself full before a storm warning, since it cannot be refilled once the sockets are dead unless you have a solar charger or a car.
Looking after it
Electrical Safety First's advice is to charge a power bank where you can see it, unplug it once full, and stop using one that swells, cracks or gets hot; our lithium battery guide covers the rest. Top it up every few months in storage, since a bank left flat for a year may not recover. For flights the Civil Aviation Authority says power banks always go in the cabin, never in the hold, you may carry two per person, and you must not charge one on board; at about 36Wh this needs no airline approval.
How it compares
On our power bank comparison the INIU B5 doubles the capacity for a little more money and weight, and the Belkin UltraCharge Pro 10K snaps magnetically to an iPhone. The Anker 25K 165W is the same idea scaled up for laptops. The Nano is the pick when it has to disappear into a pocket.
Our verdict
Buy it as the bank that lives in a coat pocket or a grab bag, charged and forgotten until a cut or a long day out. Skip it as a household's main backup for phones over several days, where the bigger INIU gives twice the charges; and skip it for a laptop, which needs 45W or more.
A researched review, built from the maker's specs, manual and UK listings; facts checked 2 Nov 2026. Sources: Anker support: Nano Power Bank 30W with built-in USB-C cable (A1259) specifications; Civil Aviation Authority: Pack Right, power banks and batteries; Electrical Safety First: power bank safety; UK Government Be Ready: emergency kit checklist.
Who shouldn't buy this
You want to keep devices running through a multi-day outage or power anything larger than phones and tablets. For that, size up to a higher-capacity bank or a proper portable power station rather than relying on this.
Key specs
| Capacity | 10,000 mAh |
| Max output | 30 W |
| Ports | Built-in USB-C cable + USB-C + USB-A |
This is a Researched review: we haven't used this product. We check every specification against at least two independent sources, re-check the UK price on a schedule where we can track it automatically, and say plainly who it isn't for. Commissions never change a rating.
Questions
How many phone charges does the Anker Nano 10,000mAh give?
About two full charges of a typical phone, or one of a large one, allowing for the conversion losses every power bank has.
Can I take the Anker Nano Power Bank on a plane?
Yes, in the cabin only. At about 36Wh it is well under the limit that needs airline approval. The Civil Aviation Authority allows two power banks per person and bans charging them on board.
Will the Anker Nano 10,000mAh charge a laptop?
No. Its 30W single-port output and 10,000mAh capacity suit phones, earbuds and a watch. Most laptops need 45W or more and a larger bank.
Does the Anker Nano come with a cable?
Yes. A USB-C cable is built into the bank and charges both the bank and your device, and there are separate USB-C and USB-A ports as well.
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