The phone is nearly empty, your bag is full, and the charging cable has disappeared into the lining. The Anker Nano A1638 makes that particular annoyance less likely: pull out its built-in USB-C lead, connect, and put the unused length away. Its attraction is a calmer carry setup, not the biggest battery for the money.
One useful cable, not three fast lanes
The retractable lead extends roughly 70cm. That gives more room to use a phone than a tiny rigid USB-C plug attached directly to a battery. A separate USB-C port and a USB-A port remain available when the built-in connector is not the right one.
Up to 45W applies to one compatible USB-C device. Connect the cable and USB-C port together and they share 22.5W, split 15W and 7.5W. Three connected outputs share 22.5W too. Think one quick top-up, not simultaneous full-speed charging for a whole table.
The detail worth paying for
The smart display makes remaining charge less ambiguous than four dots. It can help you decide whether to refill the bank before leaving. The 10,000mAh figure describes its cells, not a guarantee of multiple full charges for every phone; conversion losses and device battery size still matter.
Around 232g is noticeable in a small sling. Before choosing it, compare that weight with a simple bank and a short replaceable cable. A retractable lead is convenient precisely because it stays attached, but that also means wear to the lead affects the usefulness of the whole unit.
Check your connector before buying
USB-C phones are the most natural fit. Older Lightning iPhones need a separate suitable cable. Recharging the bank supports up to 30W input; that is distinct from its 45W output ceiling. Do not infer that every connected device will accept the advertised maximum.
Choose it if untangling or forgetting cables is a frequent annoyance. Skip it if low cost, replaceable cords, or several fast outputs matter more. Check carrier rules before flying with any power bank. This is research-based guidance, not a personal battery endurance test.
