Anker · A1638
Nano Power Bank (10K, 45W, Built-In Retractable USB-C Cable)OEM identity · checked 2026-10-07Power banksSections
Family comparison · 3 exact US models
Anker Nano power banks compared
Want a built-in cable? Compare the 10K wired Nano models. Want a lighter magnetic phone top-up? Look at the 5K MagGo Slim. The best fit depends on how you charge your phone, not just the Nano name.
BatteryRank comparison
Which Nano fits your kit?
Choose the 10K 45W for the strongest single USB-C output at 45W with a retractable cable. Choose the 10K 30W for a simpler 30W cable-first kit. Choose the 5K MagGo Slim for magnetic Qi2 carry at 122g, accepting a smaller reserve and 20W wired output.
Anker A1638 specifications · checked 2026-10-07Anker A1259 specifications · checked 2026-10-07Anker A1665 specifications · checked 2026-10-07
Manufacturer ratings · dated source on each value
What the specifications say
Single-port output shows the ceiling for one wired connection. Combined output describes power shared across ports. They answer different questions.
| Measure | Anker Nano Power Bank (10K, 45W, Built-In Retractable USB-C Cable) | Anker Nano Power Bank (30W, Built-In USB-C Cable) | Anker Nano Power Bank (5K, MagGo Slim) |
|---|---|---|---|
| Manufacturer-rated capacityOEM capacity rating | 10000 mAh. Show sourceclaimed sourceanker.comchecked 2026-10-07 · OEM capacity ratinghttps://www.anker.com/products/a1638-10k-45w-power-bank | 10000 mAh. Show sourceclaimed sourceanker.comchecked 2026-10-07 · OEM capacity ratinghttps://www.anker.com/products/a1259-built-in-cable-power-bank-10000mah | 5000 mAh. Show sourceclaimed sourceanker.comchecked 2026-10-07 · OEM capacity ratinghttps://www.anker.com/products/a1665-5k-ultra-slim-qi2-power-bank |
| Strongest single USB-C outputMaximum output from one wired USB-C port | 45 W. Show sourceclaimed sourceanker.comchecked 2026-10-07 · Maximum output from one wired USB-C port · Maximum from either one USB-C port or the built-in USB-C cable when used individually.https://www.anker.com/products/a1638-10k-45w-power-bank | 30 W. Show sourceclaimed sourceanker.comchecked 2026-10-07 · Maximum output from one wired USB-C port · Maximum output from one USB-C port or the built-in USB-C cable. Total output across ports is 24W.https://www.anker.com/products/a1259-built-in-cable-power-bank-10000mah | 20 W. Show sourceclaimed sourceservice.anker.comchecked 2026-10-07 · Maximum output from one wired USB-C port · Maximum wired USB-C output from the cable. Qi2 wireless output is rated separately.https://service.anker.com/uk/product-description/a08J1000000YmEYIA0 |
| Wireless output ceilingWireless mode; separate from the wired USB-C rating | Not sourced | Not sourced | 15 W. Show sourceclaimed sourceservice.anker.comchecked 2026-10-07 · Wireless mode; separate from the wired USB-C rating · Wireless transmitter rating; receiving device and charging mode determine actual power.https://service.anker.com/uk/product-description/a08J1000000YmEYIA0 |
| Single USB-C inputStrongest standard USB-C input; proprietary dock excluded | 30 W. Show sourceclaimed sourceservice.anker.comchecked 2026-10-07 · Strongest standard USB-C input; proprietary dock excluded · Maximum standard USB-C input. Output is rated separately.https://service.anker.com/article-description/Anker-Nano-Power-Bank-10K-45W-Built-In-Retractable-USB-C-Cable-FAQ?urlName=Anker-Nano-Power-Bank-10K-45W-Built-In-Retractable-USB-C-Cable-FAQ | 30 W. Show sourceclaimed sourceanker.comchecked 2026-10-07 · Strongest standard USB-C input; proprietary dock excluded · Maximum through one USB-C port or built-in USB-C cable.https://www.anker.com/products/a1259-built-in-cable-power-bank-10000mah | 20 W. Show sourceclaimed sourceservice.anker.comchecked 2026-10-07 · Strongest standard USB-C input; proprietary dock excluded · USB-C cable input. This is the exact-model guide rating, not the ambiguous total-output row.https://service.anker.com/uk/product-description/a08J1000000YmEYIA0 |
| Manufacturer-listed weightOEM-listed product weight | 231.3 g. Show sourceclaimed sourceanker.comchecked 2026-10-07 · OEM-listed product weight · Converted from Anker’s listed 0.51 lb.https://www.anker.com/products/a1638-10k-45w-power-bank | 215 g. Show sourceclaimed sourceanker.comchecked 2026-10-07 · OEM-listed product weighthttps://www.anker.com/products/a1259-built-in-cable-power-bank-10000mah | 122 g. Show sourceclaimed sourceanker.comchecked 2026-10-07 · OEM-listed product weighthttps://www.anker.com/products/a1665-5k-ultra-slim-qi2-power-bank |
| Explicit OEM-rated energyShown only when the manufacturer publishes watt-hours | 36 Wh. Show sourceclaimed sourceservice.anker.comchecked 2026-10-07 · Shown only when the manufacturer publishes watt-hourshttps://service.anker.com/article-description/Anker-Nano-Power-Bank-10K-45W-Built-In-Retractable-USB-C-Cable-FAQ?urlName=Anker-Nano-Power-Bank-10K-45W-Built-In-Retractable-USB-C-Cable-FAQ | Not sourced | Not sourced |
| Combined output ceilingMulti-port total; distinct from one-port output | 22.5 W. Show sourceclaimed sourceanker.comchecked 2026-10-07 · Multi-port total; distinct from one-port output · Shared maximum when multiple outputs are used. A single USB-C output is rated 45W.https://www.anker.com/products/a1638-10k-45w-power-bank | 24 W. Show sourceclaimed sourceanker.comchecked 2026-10-07 · Multi-port total; distinct from one-port outputhttps://www.anker.com/products/a1259-built-in-cable-power-bank-10000mah | Not sourced |
Unknown readings stay labelled “Not sourced.” Every displayed rating opens its dated source. Manufacturer claims are not independent output or runtime measurements.
Before you choose
The details that change the decision
Check 01
Single-port ratings differ. Shared ceilings are lower
The 10K 45W reaches 45W from one USB-C path and the 10K 30W reaches 30W, but multi-port use shares output down to about 22.5W and 24W respectively. Compare the shared ceiling when two devices will be connected.
Check 02
Wired Nano versus Nano MagGo
The two 10K models center on built-in USB-C cables for wired charging. The 5K MagGo Slim centers on magnetic Qi2 wireless output up to 15W with a 20W USB-C cable as the wired alternative. Our MagGo family page compares the magnetic models in depth.
Check 03
Capacity labels describe different kits
Both 10K models label 10,000mAh with cables built in, while the 5K labels half that in a much slimmer magnetic pack. Neither label is a measured phone-recharge count.
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Family questions
Frequently asked questions
What is the difference between Nano and Nano MagGo?
Wired Nano models charge over built-in USB-C cables and ports. The Nano MagGo Slim adds magnetic Qi2 wireless charging up to 15W in a slimmer 5,000mAh pack, with a 20W USB-C cable for wired use.
Can two devices each get the full single-port rating?
No. The 10K 45W shares output down to a 22.5W total and the 10K 30W to 24W when multiple ports are active. Use the shared ceiling for two-device planning.
Which Nano is smallest to carry?
The 5K MagGo Slim lists 122g and 8.6mm thick, against 215g for the 10K 30W and about 231g for the 10K 45W. It carries less energy in return.
Check the rest of your charging setup
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