Anker Nano Pro 20 W USB-C Charger Review
Research-based review. Pickora separates manufacturer specifications and third-party evidence from our editorial buying judgment. We do not present unperformed hands-on testing as our own.
The Anker Nano Pro 20 W is a compact single-port USB-C charger for phones and other low-power USB-C devices. It makes the most sense as a travel or spare adapter when 20 W is enough and you already own a compatible cable.
Its single port and 20 W ceiling make it a poor fit for laptop charging, charging two devices at once, or phones that support much faster wired charging.
Best For
- A spare single-device phone charging point
- Travelers who prioritize a small adapter over maximum power
- Buyers who already own the appropriate USB-C charging cable
Who Should Skip It
- You need to charge two devices at once
- You are replacing a laptop power supply
- You want the fastest iPhone 17 Pro Max top-up
Key Specifications
- Configuration
- Nano Pro 20 W; 1 × USB-C port; cable not included
- Model Number
- A2637 Nano Pro / Anker Nano 20 W family
- Maximum output
- 20 W
- Ports
- 1 × USB-C
- Output profiles
- 5 V ⎓ 3 A / 9 V ⎓ 2.22 A (Anker)
- Cable
- Not included
Strengths
- Small enough to leave in a bag, desk drawer or travel pouch
- 20 W USB-C Power Delivery covers fast charging on many recent iPhones
- Standard USB-C Power Delivery works with iPhones, iPads, Android phones and earbuds
Limitations and Trade-offs
- One port, so only one device charges at a time
- Too little power for most laptops
- No cable in the box
What 20 W means in everyday use
Anker rates the A2637 at 20 W from a single USB-C port. That is enough for phones, earbuds and other small USB-C devices, and it supports fast charging on many recent iPhones. It is not enough for laptop charging or for the highest wired charging speeds some newer phones support; Apple specifies a higher-wattage adapter for the iPhone 17 Pro Max’s fastest wired charging.
A useful spare, not automatically an upgrade
If your current adapter already charges your phone reliably at the rate you need, another adapter mainly buys a second location. A bedside spare can be worthwhile even when it does not shorten charging time. A buyer replacing an older low-power adapter should check the phone’s supported charging protocol, not wattage alone.
Remember the cable
A charging cable is not included. iPhone 15 and later use USB-C, so a USB-C to USB-C cable works. iPhone 14 and earlier use Lightning and need a USB-C to Lightning cable. If you do not already own the right cable, add its cost when comparing this charger with kits that include one.
Choose the charger around your next device too
A one-port adapter commits you to charging one device at a time. If a tablet, laptop or second phone is already part of your travel kit, a properly specified multi-port charger may reduce duplication. Its shared-output table matters: an advertised total does not mean every port receives that power simultaneously.
Buying Decision
Choose the Nano Pro 20 W if you want a compact charger for one phone or small accessory and already have the right cable. Look at a higher-wattage or multi-port charger for laptops, the fastest supported phone charging, or several devices.
Value and Trade-offs
Its value rests on a modest price and a cable you already own. Paying more for a higher-wattage charger only makes sense if a device you own can use that extra power or you need a second port.
Final Verdict
The Nano Pro 20 W is a sensible travel or spare charger for one phone. Its 20 W ceiling and single port limit its usefulness beyond that, so it is not the right choice for a laptop or a multi-device setup.
How Pickora Scored It
- Single-phone utility — 4.2/5 (35%)
A clearly specified single USB-C output serves a spare-phone-charger role.
- Packing simplicity — 4.2/5 (25%)
Compact format, with a separate cable still needed.
- Power flexibility — 2.5/5 (20%)
20 W and one port limit future devices and simultaneous charging.
- Value fit — 4/5 (20%)
Useful at an appropriate price when the buyer already has a cable.
Final Pickora Rating: 3.8/5.
Sources and Research
- A2637 Nano 20 W specifications — Anker. 20 W output, single USB-C port and electrical output profiles.
- iPhone 17 Pro Max charging requirements — Apple. Apple’s adapter requirement for the iPhone 17 Pro Max’s fastest advertised wired charging.
- Amazon product page — Amazon. Configuration sold through this review’s Amazon link: Nano Pro 20 W, single USB-C port, no cable included.
Frequently Asked Questions
How much power does the Anker Nano Pro provide?
Anker rates this model at up to 20 W from its single USB-C port.
Can it charge two devices at once?
No. Anker specifies one USB-C output port.
Is a charging cable included?
No. You need a cable that matches your device: USB-C to USB-C for iPhone 15 and later and most Android phones, or USB-C to Lightning for iPhone 14 and earlier.
Will it provide the iPhone 17 Pro Max’s fastest advertised wired charge?
No. Apple specifies a higher-wattage adapter for that fast-charge condition, and this adapter is limited to 20 W.
Can it charge a laptop?
Not as a practical laptop charger. Most laptops need considerably more than 20 W, so use a charger that matches the laptop’s required USB Power Delivery wattage.