Anker Nano Power Bank A1259 Review: One Less Cable

This Anker Nano Power Bank (30W, Built-In USB-C Cable) A1259 review looks at a simple idea: a power bank that carries its own cable, so you are never stuck with a charged battery and nothing to plug into your phone. It is aimed at travelers and everyday commuters who want a compact 10,000mAh bank with fast charging and a couple of extra ports. It sits in the mid-range part of the market. This review is based on manufacturer specs and what independent experts report, not on our own hands-on testing.

Design and build

The defining feature is the built-in USB-C cable. Anker has made it part of the body, and it doubles as a carry handle. For a bag-stuffing accessory, that matters: the cable can't get left behind or tangled with other cables, and the cable doubles as a carry handle.

The body measures 4.09 × 2.06 × 1.02 in (104 × 52.3 × 26 mm) and weighs 7.58 oz (215 g). The casing is 80% post-consumer recycled plastic, a small plus if that matters to you.

A color display shows charging status. It shows charging status at a glance.

The built-in cable also brings the main design trade-off. If it fails, you cannot swap it for a new one. That is the price of the convenience, and we come back to it below.

Features and what they mean day to day

Built-in cable that works both ways

The attached USB-C cable charges phones, tablets and laptops, and it also recharges the bank itself. In practice, you can plug the cable into a wall charger to refill the bank, then use the same cable to top up a device later. You need no second cable for either job.

The cable accepts up to 30W input and delivers up to 30W output. Those are the headline figures for the A1259, and they are what make it suitable for more than just phones.

Extra ports for a second device

Beyond the built-in cable, there is one USB-C port and one USB-A port. That lets you charge a second device alongside your phone, such as earbuds or a friend's phone. The USB-C port can output up to 30W, while the USB-A port tops out at 22.5W Max.

The catch is that total output across multiple ports is 24W Max. When you charge two or three things at once, the bank shares its power, so you will not get the full 30W for your main device. A common criticism from reviewers is exactly this drop when several ports are in use.

Fast charging claims

Anker says the A1259 can take an iPhone 14 to 50% within 30 minutes, and can recharge itself to 50% in 45 minutes. These are manufacturer claims, and real results depend on the device, the charger you use and how the bank is being used at the time. They do show the intent, though: this is a bank built for quick top-ups between meetings, flights or train changes, rather than slow overnight trickle charging.

Performance, capacity and recharging

A 10,000mAh capacity is a popular middle ground for portable banks: big enough to be useful, small enough to carry daily. Reviewers note it gives roughly two phone charges. That is plenty for a day out or a short trip, and it is fine as an emergency backup. It is less ideal if you are away for several days or you charge multiple devices heavily.

Because 30W is the ceiling, how a laptop behaves will depend on how much power it asks for. The bank can charge laptops, but pushing a power-hungry one is a different thing from topping up a phone. Treat the laptop support as a useful extra and check your laptop's power needs against the 30W limit.

Another point reviewers raise is efficiency. It is described as average rather than outstanding, and the bank can be picky about actually reaching the full 30W. So the headline output is a best-case figure. Expect the usable result to fall short of 30W at times, since reviewers say the bank can be picky about hitting it.

On recharging, the 45-minute claim to reach 50% is a real strength for anyone who forgets to charge the bank overnight. A short stop at a wall charger gives you a half-full battery.

Anker Nano Power Bank (30W, Built-In USB-C Cable) A1259 review: what experts say

Expert coverage is positive overall. Trusted Reviews scores it 4/5 and Digital Camera World scores it 4.5/5, and the 8.5/10 average across those 2 expert reviews is a solid result. It has also been recommended in one expert buying guide.

What reviewers praise:

• The built-in USB-C cable removes the need to pack a separate cable.
• Two-way 30W fast charging, including the claimed iPhone 14 result, is a standout.
• It recharges quickly, reaching 50% in 45 minutes.
• The extra USB-C and USB-A ports let it serve a second device.
• The color display and carry-handle cable are seen as thoughtful touches.

What they criticise:

• Combined output falls to 24W Max when several ports are in use.
• Efficiency is only average, and the bank can be picky about hitting 30W.
• 10,000mAh gives roughly two phone charges, which limits longer trips.
• The built-in cable cannot be replaced if it fails.

None of these are dealbreakers for the target buyer, but the cable point deserves thought. A fixed cable is a convenience until it is a failure point. Best Buy lists a 24-month warranty for it, though you should check the terms where you buy.

Who should buy it, and who should skip it

Buy it if you want a compact power bank that handles phone top-ups without a separate cable. It suits travelers and commuters who regularly find themselves hunting for a cable, and anyone who likes having a spare USB-C and USB-A port for a friend or a pair of earbuds. The quick self-recharge also suits people who often forget to charge the bank in advance.

Skip it if you need several full phone charges per trip, since 10,000mAh gives roughly two. Look elsewhere too if you want a replaceable cable, or if you routinely charge multiple devices and need full power on every port, since the combined output is 24W Max.

How it fits in its category

The A1259 combines 10,000mAh capacity with a built-in USB-C cable and a color display. If you prefer to compare it with another Anker Nano model, see our Anker Nano Power Bank A1638 review.

Verdict

The A1259 does the thing it sets out to do: it gives you a compact battery with a cable already attached, fast two-way charging and a few extra ports. Experts rate it well, and the compromises are clear and honest. It shares power when several ports are in use, its efficiency is only average, its capacity covers about two phone charges, and the cable is fixed. If those limits fit how you travel and commute, it is an easy, convenient everyday companion. If you want more capacity or a swappable cable, look at other options.

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