Product image supplied by the brand
In this guide
In the UK the Zolo 10K (model A1688) is sold on Amazon by AnkerDirect UK and dispatched by Amazon, with an RRP of £23.99. The box holds the bank, its attached USB-C cable, a welcome guide and Anker's 18-month warranty, and nothing else: no plug and no spare cable.
The figure to plan around is not on the front of the box. Anker's FAQ multiplies the rated capacity by 0.65 and says a full Zolo typically gives 5,500 to 7,000 mAh. The Amazon UK bullets talk up 30 W and a cable tested past 10,000 bends; the FAQ is the part that tells you how many charges to expect.
Our verdict
Against its £23.99 RRP, a reasonable phone-only bank, provided you judge it by Anker's usable 5,500 to 7,000 mAh rather than the label. The fixed cable is both the convenience and the likeliest point of failure.
- A good fit for
- Someone who wants one thing in a coat pocket, keeps forgetting cables, and needs about one and a half phone top-ups rather than a weekend's worth.
- We would skip it if
- You want three full charges from 10,000 mAh, need to run a laptop, or regularly fast-charge two phones at once, since shared output falls to 15 W.
Reasons to consider it
- Anker's FAQ gives the conversion itself: capacity × 0.65, about 1.67 charges for a 3,877 mAh phone
- Up to 30 W out and 20 W in; Anker puts a refill from a 20 W charger at about 2.5 hours
- A percentage display and a low-current mode for earbuds, entered with a double press of the button
The compromises
- The 13.7 cm cable is permanent; if it fails, you are left with the USB-C and USB-A ports and a cable of your own
- Pass-through charging stops at 5 V / 3 A and Anker rules it out for laptops
- With more than one device connected, output drops to 5 V / 3 A, 15 W in total
What we have not verified: Delivered capacity, how the attached cable copes with years of bending, and cell ageing are all unmeasured here; the 0.65 factor and the 10,000-bend figure are Anker's own claims.
The things in this guide
A closer look at the products, who they may suit, and what to check before buying.
Zolo Power Bank · 10K, 30W, Built-In Cable
The attached cable removes the usual way a power bank lets you down, and Anker's published 5,500 to 7,000 mAh range sets the expectation before you buy.
Before you buy: Plan on roughly 1.5 phone charges, not three, and expect the fixed 13.7 cm cable to be the first part to wear.
Price checked 5 November 2026. Retailer prices can change.The FAQ figure is the specification
Anker explains the shortfall in its own FAQ: converting and delivering the charge loses 30 to 45 percent, so a full Zolo typically hands over about 5,500 to 7,000 mAh. Its worked example divides 10,000 × 0.65 by a 3,877 mAh phone battery and lands on about 1.67 charges.
Run the same sum on your own phone before buying. A larger battery than that example gets proportionally fewer top-ups, and a tablet may not get one full charge. For a day out or a train journey, one full charge plus a partial one is the realistic budget.
A cable that cannot be forgotten, or replaced
The 13.7 cm USB-C cable is part of the body. It charges a phone at up to 30 W and also refills the bank, and a separate USB-C port marked IN/OUT does the same job when the attached lead is busy or worn. Amazon UK's listing says the cable is tested to more than 10,000 bends; that is Anker's figure, not an independent one.
What it removes is the familiar failure of carrying a charged bank and no lead. What it adds is a part you cannot swap: once the strain relief frays, the bank still works through its ports, but you are back to packing a cable, which is the problem this design exists to solve.
Thirty watts for a phone, nothing for a laptop
Anker lists 30 W out and 20 W in, about 2.5 hours to refill from a 20 W charger, and pass-through charging capped at 5 V / 3 A, with an explicit note that it does not work for laptops. A double press of the button switches to a low-current mode for earbuds and watches.
For most phones 30 W is more than they will draw, and a percentage readout beats counting four lights. A laptop is a different matter: the bank cannot sit between a wall charger and a notebook, and 30 W will not keep a working laptop topped up.
Three outputs, one shared ceiling
Alongside the fixed cable the body carries a USB-C port and a USB-A port, so three devices can charge together. Anker's own note sets the catch: with more than one output in use, the total falls to 5 V / 3 A, 15 W. The 30 W figure describes one device charging alone.
Anker's US gallery prints the body at 4.32 × 2.58 × 0.98 inches, about 110 × 66 × 25 mm, and 212 g. The box contains no plug, so budget for a USB-C charger of 20 W or more if you do not already own one.
When to buy something else
Pass on it if you already carry a good cable everywhere and want two devices charging quickly at the same time: the extra ports work, but the 15 W shared limit means neither gets the headline speed.
A laptop on the list is the other reason. The 30 W ceiling and the pass-through exclusion rule it out, so put the money towards a bank whose maker publishes a laptop-class USB-C output.
How we put this together
Built from the product pages and listings below, without test scores or results we have not measured. Specifications and prices change, so check the original page for the exact model, current price, delivery, and returns.
- Amazon UK: Anker Zolo Power Bank 10,000 mAh 30W (A1688) (opens in a new tab)
- Anker: Zolo Power Bank (10K, 30W), model A1688 (US product page) (opens in a new tab)
