Anker Fusion A1637 (USB-C cable) vs Anker Nano A1638 (retractable USB-C cable)
Is it more useful to refill directly at a wall outlet or to have more built-in cable reach while charging a phone?
Products compared
ASIN B0CX4992Z8
Anker Fusion A1637 (USB-C cable)
You want the bank itself to plug into a suitable wall outlet for refilling.
Last observed offer
$42.99
List Price: $52.99
- Prime membership required
Price checked
Observed condition: new. Coupon and subscription requirements unverified.
ASIN B0DGKWTQQC
Anker Nano A1638 (retractable USB-C cable)
You already have or will supply a suitable USB-C adapter.
Last observed offer
$59.99
- Confirm offer eligibility on Amazon
Price checked
Observed condition: new. Coupon and subscription requirements unverified.
Prices are per listed package. Pickoryx may earn a commission from qualifying purchases through the paid Amazon links on this page, at no added cost to you.
Published by Pickoryx · Published 2026-10-10 · Source checked 2026-10-10 21:09 UTC
The main trade-off
The Fusion integrates the AC refill plug; the Nano pairs external USB-C refilling with a longer retractable cable.
Quick verdict
Choose the Fusion A1637 if direct wall refilling would remove a separate adapter from your power-bank kit. Choose the Nano A1638 if you already carry a suitable USB-C supply and want more built-in cable reach. The choice is about refill equipment and phone placement, rather than a guaranteed charging-speed advantage.
Choose Anker Fusion A1637 (USB-C cable) if
- You want the bank itself to plug into a suitable wall outlet for refilling.
- Keeping the phone and bank close together works for you.
Choose Anker Nano A1638 (retractable USB-C cable) if
- You already have or will supply a suitable USB-C adapter.
- You want to place the phone farther from the bank without adding a separate charging cable.
When the recommendation changes
- A wall adapter is already essential for your other devices, reducing the packing benefit of the Fusion.
- Your intended phone position exceeds the Fusion cable reach, making the Nano more useful even if you must bring an adapter.
The differences that matter
| Decision point | Anker Fusion A1637 (USB-C cable) | Anker Nano A1638 (retractable USB-C cable) |
|---|---|---|
| Refill Equipment | Integrated AC plug can refill the bank directly from a suitable wall outlet; USB-C input is also listed.[1] | Refills through its USB-C cable or port. Anker recommends a 30W-or-higher USB Power Delivery adapter for optimal recharging; a charger and separate USB-C cable are not included.[2] |
What this changes: Choose the Fusion if leaving out a separate wall adapter for refilling this bank is the priority. If you already carry a suitable USB-C supply, the Nano fits that existing refill routine. This does not establish that either will refill faster.[1, 2] The better fit depends on your priorities | ||
| Cable Reach | Fixed built-in USB-C cable listed at 0.82 ft.[1] | Retractable USB-C cable listed at approximately 2.3 ft; Anker says the length is estimated and not marked on the product. A slight outward pull releases it to retract.[2] |
What this changes: The Nano gives more built-in reach when the phone and bank need separate positions on a desk. The Fusion suits close-together placement. Decide the reach requirement independently of how you refill the bank; longer reach does not establish longer cable life.[1, 2] The better fit depends on your priorities | ||
Best for your routine
Leaving out a separate adapter specifically for refilling the bank
Best fit: Anker Fusion A1637 (USB-C cable)
Based on listed features, not comparative testing.
The Fusion carries its own AC plug. Count the benefit only if your other gear does not already require a separate adapter.
Keeping a phone apart from the bank on a desk
Best fit: Anker Nano A1638 (retractable USB-C cable)
Based on listed features, not comparative testing.
The Nano has more manufacturer-listed built-in cable reach. Check the actual placement and leave slack at both connectors.
Value and trade-offs
One or both observed offers have eligibility conditions, so no unrestricted price difference is shown.
If either costs more, pay for the convenience you will actually use: direct wall refill or longer retractable reach. Include any USB-C adapter you still need when comparing your total setup cost.
There is insufficient verified price history to recommend purchase timing. Check current price and availability for the exact USB-C variants.
Limitations
- This comparison covers the black USB-C Fusion A1637, manufacturer SKU A1637111, not the Lightning-cable variant. Check the selected variant and current availability before ordering.
- Manufacturer specifications do not establish sustained charging output, delivered energy, heat, cable-mechanism life or real-world pocket comfort. We did not test either bank.
- The Nano’s advertised 45W is a maximum for compatible devices, not a universal or sustained charging rate. Device requirements and the selected connection matter.
- The Fusion page mixes USB-C and Lightning information and contains inconsistent combined-output totals, so those totals are not used here.
- A built-in USB-C connector does not establish compatibility with every phone, laptop, host or travel situation. Check your device and destination requirements.
Questions shoppers ask
What if I want both direct wall refill and longer cable reach?
Neither built-in arrangement gives you both advantages in this comparison. Decide which compromise you prefer: the Fusion with a separate suitable cable for a farther-away phone, or the Nano with an external USB-C refill supply. Do not assume a separate cable is included.
Does the Nano need a separate cable just to recharge itself?
Its built-in USB-C cable can serve as an input, so it can connect directly to a suitable USB-C supply. A separate cable is an alternative through the USB-C port; the supply still has to come from elsewhere.
Methodology and sources
Compared manufacturer-documented refill inputs and built-in cable arrangements. Recommendations are conditional feature-fit judgments, not measured performance rankings.
AI assisted source research, drafting and editing. We did not perform hands-on testing.
View 2 sources
- 1.Anker Power Bank (10K, Fusion, Built-In Cable)Anker · Official specifications · Source checked 2026-10-10 20:51 UTC
Evidence used on this page
- Model Number A1637; Your 3-in-1 Power Solution; Total Input; embedded USB-C black SKU A1637111: Exact-model manufacturer facts about refill input and integrated cable configuration; promotional performance and durability claims are not adopted.
- 2.Anker Nano Power Bank (10K, 45W, Built-In Retractable USB-C Cable)Anker · Official specifications · Source checked 2026-10-10 20:52 UTC
Evidence used on this page
- Model Number A1638; Specifications Input; Using Anker InstaCord; Notes 2; charger/cable inclusion note: Exact-model manufacturer facts about refill input and integrated cable configuration; promotional performance and durability claims are not adopted.