The box says 25W. The charger says 25W. The phone, after twenty minutes face down on the pad, says 31%. Welcome to wireless charging, where every number is true and none of them is the one you wanted.

The short answer: Qi2 25W is real, but you only get it when four things line up: a phone certified for Qi2.2, a charger certified for Qi2 25W, a wall adapter with enough headroom, and a battery cool enough to accept it. Miss one and you quietly drop to 15W or less, with no error message to tell you.

What changed in July 2025

The Wireless Power Consortium, the group behind the Qi standard, launched Qi version 2.2.1 on 23 July 2025 and branded it Qi2 25W. Its own release describes the new tier as delivering nearly 70% more power than the original Qi2, which arrived in November 2023 at 15 watts. Fourteen devices passed certification in a limited launch; several hundred were queued for testing. Read the WPC announcement.

The important word is certified. Qi2 is a magnetic standard, so the charger and the phone snap into alignment. That alignment is what lets the system push more power without wasting it as heat. A charger that merely has magnets is not the same as a charger that passed the test.

Which phones actually take 25W

As of October 2026, the makers' own specification pages are the reliable source. Here is what they say.

Wireless charging ceilings stated by the phone makers

Phone	Maker's stated wireless ceiling	Adapter the maker says you need
iPhone 17 family	MagSafe up to 25W; Qi2 up to 25W	30W or higher for the 25W rate
iPhone 16 family	MagSafe up to 25W; Qi2 up to 25W	30W or higher (stated for MagSafe)
Pixel 11, 11 Pro, 11 Pro XL, 11 Pro Fold, Pixel 10 Pro XL	Up to 25W on Google's Pixelsnap Charger	35W or higher
Pixel 10, 10 Pro, 10 Pro Fold	Up to 15W on the same charger	20W or higher
Galaxy S26 Ultra	Up to 25W on Samsung's Magnet Wireless Charger	45W Samsung adapter (or higher PPS adapter); a magnetic case is required

Sources: Apple's iPhone 17 specifications, Apple's iPhone 16 specifications, Google's Pixelsnap Charger page and Samsung's Magnet Wireless Charger listing. Google's page is explicit that the charger supports up to 25W for Qi2.2-certified devices and up to 15W for Qi2.0-certified devices. If your phone is not in this table, assume 15W or lower until its spec page says otherwise.

Notice the Galaxy row. Samsung's phones have no built-in magnets, so the magnetic alignment that Qi2 relies on comes from a case. No case, no snap, no 25W.

The chain that decides your real speed

Think of wireless charging as four gates in a row. Power only flows at the rate of the narrowest one.

1. The wall adapter. A 25W pad asks for more than 25W from the wall because conversion loses some. That is why Apple says 30W or higher, Google says 35W or higher and Samsung says 45W. Plug a 25W pad into an old 18W brick and the pad never sees enough power to deliver its headline.
2. The charger. Look for Qi2 25W certification, not just the words "25W" or "magnetic". Certified chargers fall back to 15W for Qi2.0 phones, which is what most phones still are.
3. The phone. The phone's receiver sets its own ceiling. A Pixel 10 Pro on a 25W pad is a 15W phone. Nothing on the charger side can change that.
4. The battery manager. Even with all three gates wide open, the phone decides moment by moment. Heat, a nearly full battery or a thick case can pull the rate down. This is why makers quote "50% in about 30 minutes" rather than a flat wattage; Apple's iPhone 17 footnote says exactly that, from testing in July 2025 with its own 30W adapter and MagSafe Charger.

Our 2018 archive piece on wireless power claims was already grumbling that the headline watt figure hides the conditions. Eight years later the number got bigger and the conditions got longer.

A hypothetical afternoon, in watts

Here is an illustration, not a measurement. Suppose a phone is certified for 25W, the pad is certified for 25W, and the adapter is a 20W unit left over from a previous phone.

• The pad draws what the adapter can give and ends up delivering something closer to a 15W experience.
• You swap in a 35W adapter. The first fifteen minutes run noticeably faster, because the phone is cool and nearly empty.
• Past roughly the halfway mark, the phone tapers to protect the battery. Your "25W" hour was really a 25W quarter-hour followed by a gentle glide.

That taper is normal and deliberate. If you want a refresher on why phones ease off near the top, read our guide to the 80% charging limit. Fast wireless charging and battery care are a negotiation, and the phone always wins.

A five-minute checklist before you buy a 25W charger

1. Open your phone maker's specification page and find the wireless charging line. If it says Qi2 or MagSafe "up to 15W", stop here; a 25W pad will not help.
2. Check the charger listing for Qi2 25W certification, not just a wattage in the title.
3. Check whether an adapter is included. Many 25W pads ship with a cable only. Budget for a 30W, 35W or 45W adapter according to your phone maker's figure.
4. If you own a Galaxy, confirm you have a Qi2-ready magnetic case.
5. Decide whether 25W matters to you. For overnight charging it does not. For a 30-minute top-up before leaving the house, it is the difference between "fine" and "why did I bother".

Frequently asked questions

Is Qi2 25W the same as Qi2.2?

Qi2 25W is the consumer brand name. Qi version 2.2.1 is the specification number behind it. Google's product pages use "Qi2.2-certified"; Apple's pages say "Qi2 wireless charging up to 25W". They mean the same tier.

Will a 25W charger damage a 15W phone?

No. A certified charger negotiates with the phone and delivers only what the phone requests. The phone's ceiling is the ceiling.

Why does my phone get warm on a 25W pad?

Wireless transfer is less efficient than a cable, and the lost energy becomes heat. The battery manager responds by slowing the charge, which is the taper described above. A thick case or a warm room makes it happen sooner.

Does wired charging still win?

For raw speed, yes. Apple quotes 50% in 20 minutes with a 40W adapter over cable, against 30 minutes wirelessly. Wireless charging buys convenience, not the fastest refill.