Anker PowerPort III Nano (20W) Review

Overview

The Anker PowerPort III Nano (model A2633) is a single-port, 20W USB-C GaN wall charger that weighs 30g and packs down to roughly the size of a large sugar cube. It’s aimed squarely at iPhone users who need a compact, fast charger for travel and town stops — but its wide voltage range and featherweight profile make it relevant for any backpacker who hits an outlet every few nights and wants the smallest possible wall wart in their kit.

Key Specs

Spec	Detail
Model	A2633
Weight	30g (1.06 oz)
Dimensions	1.81 × 1.08 × 1.08 in
Wattage	20W (max)
Ports	1× USB-C
Output	5V/3A · 9V/2.22A
Input	100–240V, 0.6A, 50–60Hz
Charging Tech	PowerIQ 3.0 / USB-PD 3.0 / QC 3.0
Prongs	Fixed (non-folding)
Warranty	18 months
Comparison	See how Anker PowerPort III Nano compares to similar gear

Performance

For iPhone users, this charger does exactly what it says. It charges an iPhone 13/13 Pro to 50% in roughly 25 minutes — about 3× faster than a standard 5W adapter. Real-world measurements are solid if not quite at the rated ceiling: testing against an iPhone 13 showed 18.7W actually reaching the phone rather than the full 20W, but that gap is negligible in practice.

The Nano’s compact size is possible thanks to GaN (Gallium Nitride) technology, which packs more power into a smaller footprint than traditional silicon-based chargers.

That 30g body is genuinely remarkable — it weighs about the same as a AA battery. For reference, the older Anker PowerPort Atom PD 1 delivers 30W but is roughly twice the volume.

On the compatibility front, the picture is nuanced. The port conforms to the USB Power Delivery 3.0 standard, and Anker’s PIQ 3.0 label also covers Quick Charge, Apple Fast Charging, and older standards — so legacy Android devices charge without issue. However, the charger doesn’t support USB Power Delivery PPS, which means Samsung Galaxy S21-series phones and similar PPS-dependent handsets top out around 14.3W rather than the 25W they’re capable of. That’s a real limitation if you carry a flagship Samsung or a newer Android that relies on PPS for max-speed charging.

Larger USB-C devices like tablets and laptops will draw power, but you’re looking at several hours to reach a full charge at 20W

— not a dealbreaker for an overnight hostel stop, but keep expectations in check. The Nintendo Switch charges fine in handheld mode;

it will not, however, support Charge-and-Play in TV/docked mode.

The 100–240V input is a genuine plus for international hikers — you just need the appropriate plug adapter and this charger is good anywhere in the world.

One small but real-world concern: the charger doesn’t automatically shut off when a device reaches 100%, but it does include overcharging protection and temperature control that puts it into standby mode, consuming very little power. Fine for overnight charging in a hostel, but worth knowing.

Pros & Cons

Pros

• Exceptional weight-to-wattage ratio at 30g / 20W — hard to beat for a town-stop charger
• GaN construction delivers real compactness: nearly identical in footprint to an old Apple 5W brick
• Wide 100–240V input handles international outlets with just a plug adapter
• PIQ 3.0 covers USB-PD 3.0, QC 3.0, and Apple Fast Charge — broad enough for most trail electronics
• Charges an iPhone to 50% in ~25 minutes; solid for quick hostel stops
• Competitive price (typically $15–16 USD)
• 18-month warranty

Cons

• The fixed, non-folding prong is the standout design downside — adding a hinge would add mass, so Anker chose size over convenience, but it means the prongs can snag in a bag or an overstuffed hip belt pocket

• No PPS support limits Samsung Galaxy S-series and other PPS-dependent phones to around 14.3W instead of their rated 25W fast-charge speeds

• Single port means you’re charging one device at a time — pair this with a USB-A adapter or a second charger if you carry multiple gadgets

• More modern devices capable of charging above 20W won’t hit their peak speeds with this charger

  — something to weigh if you’re running an iPhone 15 Pro or a newer flagship Android
• No cable included

Who Should Buy This

This charger is an easy yes for iPhone users (12 through current generation) who want the absolute minimum weight and volume for town stops and resupply charges. It’s also a solid pick for hikers with a single USB-C device — a GPS, a headlamp, or a small Android phone — who just need reliable fast charging in a near-weightless package. If you’re carrying two devices that both need a simultaneous top-up, or you’re running a Samsung Galaxy S-series phone and care about hitting true fast-charge speeds, look at a dual-port option or a 30W PPS-capable charger instead.

Verdict

The Anker PowerPort III Nano delivers an impressive amount of charging speed in one of the smallest, lightest wall charger packages available, and the price-to-performance ratio is hard to argue with for iPhone-centric hikers. The fixed prongs are a minor but legitimate annoyance, and the missing PPS support means Samsung users are leaving speed on the table. At 1.06 oz, though, it’s the kind of thing you almost don’t notice carrying — and that counts for a lot on a long trail. Rating: 7.5/10.