Working back from the battery sizes, Apple's "Up to 50% charge in around 15 minutes" means an average of about 34 W going into the battery of an iPhone 18 Pro and about 44 W for an iPhone 18 Pro Max. That is our estimate, not an Apple figure; the calculation is below.
What does Apple say about iPhone 18 Pro charging?
As of October 2026, Apple's tech specs and its support article "Fast charge your iPhone" (published October 22, 2026) give the same figures for both models:
| Charging method | Apple's figure (iPhone 18 Pro and iPhone 18 Pro Max) | What you need |
|---|---|---|
| Wired, USB-C | Up to 50% in around 15 minutes | A 60W-capable adapter with AVS and a USB-C cable |
| MagSafe | Up to 50% in 30 minutes; up to 25W | A MagSafe Charger and a 35W or higher adapter |
| Qi2 | Up to 25W | A Qi2 charger; Apple gives no time |
| Maximum wired wattage | Not published | |
| 0 to 100% time | Not published |
Apple's times come from drained preproduction units in July 2026, timed from the Apple logo at startup, with the Apple 40W Dynamic Power Adapter with 60W Max and the Apple USB-C cable or a MagSafe Charger. Charge time, Apple adds, varies with adapter, settings, usage and environmental factors.
USB Power Delivery (USB PD) is the standard from the USB Implementers Forum (USB-IF) that lets a USB-C charger and the device agree on more power than basic USB provides, "providing more flexible power delivery along with data over a single cable". Its Adjustable Voltage Supply (AVS) mode lets the device being charged request intermediate voltages instead of only the charger's fixed voltage steps. Apple's store page says AVS "precisely adjusts voltage for a more efficient charge".
Apple's own pages disagree on one detail. The tech specs footnote, and the support article's own footnote, ask for USB PD 3.1 (or better) adapters with AVS; the support article's main text asks third-party adapters for AVS and USB-PD 3.2. An adapter that lists both AVS and USB PD 3.2 meets both.
Apple sells the 40W Dynamic Power Adapter with 60W Max for $39 in its US store, and its product page says the adapter has AVS.
How many watts does the iPhone 18 Pro charge at?
Apple does not say. It publishes which adapter you need and how long 0 to 50% takes, not the power the phone takes in. "60W-capable" describes the charger.
What we can calculate is the average power Apple's time implies: half the battery's energy divided by the time. Battery sizes are from iFixit's teardown, for the iPhone 18 Pro without a SIM tray and the US iPhone 18 Pro Max:
- Battery: 16.76 Wh (4,288 mAh) in the iPhone 18 Pro and 21.75 Wh (5,567 mAh) in the iPhone 18 Pro Max.
- Half the battery: 8.38 Wh for the iPhone 18 Pro and 10.88 Wh for the iPhone 18 Pro Max.
- Apple's time: around 15 minutes, which is 0.25 hours.
- Average power into the battery: 8.38 Wh ÷ 0.25 h = 33.5 W, about 34 W, for the iPhone 18 Pro, and 10.88 Wh ÷ 0.25 h = 43.5 W, about 44 W, for the iPhone 18 Pro Max.
Apple rounds its time, so each minute more or less than 15 changes the result by about 7%. These are averages over the first half of the charge, not peaks, and not what the adapter puts out: Apple asks for a 60W-capable adapter, while the average reaching the battery works out to about 34 to 44 W.
The iPhone 18 Pro Max battery holds about 30% more energy than the iPhone 18 Pro battery (21.75 Wh against 16.76 Wh). Apple gives both the same rounded time; if both take about 15 minutes, the iPhone 18 Pro Max takes in about 30% more power on average.
What is the battery capacity of the iPhone 18 Pro and iPhone 18 Pro Max?
It depends slightly on where the phone was sold: Apple's "Identify your iPhone model" page says both models have no SIM tray in the United States, Canada, Japan, Mexico and several Gulf states, and a nano-SIM tray elsewhere; iFixit notes that physical-SIM models have smaller batteries.
| Model | Battery | Source |
|---|---|---|
| iPhone 18 Pro, no SIM tray | 16.76 Wh (4,288 mAh) | iFixit teardown, battery label |
| iPhone 18 Pro, with SIM tray | 4,056 mAh, about 15.85 Wh | EU EPREL database (model A3714); Wh calculated |
| iPhone 18 Pro Max, US model (no SIM tray) | 21.75 Wh (5,567 mAh) | iFixit teardown, battery label |
| iPhone 18 Pro Max, with SIM tray | 5,391 mAh, about 21.06 Wh | EU EPREL database (model A3717); Wh calculated |
iFixit's figures imply 3.909 V (16.76 Wh ÷ 4.288 Ah) and 3.907 V (21.751 Wh ÷ 5.567 Ah), so 4,056 mAh × 3.909 V ≈ 15.85 Wh and 5,391 mAh × 3.907 V ≈ 21.06 Wh. None of the sources checked (Apple, iFixit, EPREL) gives a capacity for the eSIM-only iPhone 18 Pro Max sold outside the US.
With a SIM tray, the battery is about 5% smaller on the iPhone 18 Pro and about 3% smaller on the iPhone 18 Pro Max, so the same 15-minute calculation gives about 32 W and about 42 W.
What charger do the iPhone 18 Pro and iPhone 18 Pro Max need?
As of October 2026, Apple's "Identify your iPhone model" page lists the iPhone 18 Pro and iPhone 18 Pro Max as the only iPhone 18 models. Apple publishes no time for 30W or 40W adapters with them. For a 20W adapter the table shows a lower bound instead: battery Wh × 50% ÷ 20 W, as if every watt went into the battery. The real time can only be longer.
| Charger | iPhone 18 Pro, to 50% | iPhone 18 Pro Max, to 50% | Where the number comes from |
|---|---|---|---|
| 60W-capable USB-C adapter with AVS | About 15 min (about 34 W into the battery) | About 15 min (about 44 W) | Apple's time; watts calculated |
| MagSafe Charger + 35W or higher adapter | About 30 min | About 30 min | Apple's time |
| Qi2 charger (up to 25W) | Not published | Not published | Apple gives the wattage only |
| 20W USB-C adapter | At least 25 min | At least 32 min | Lower bound, calculated |
Times from a drained battery to 50%. Watts and the 20W bound use the iPhone 18 Pro without a SIM tray (16.76 Wh) and the US iPhone 18 Pro Max (21.75 Wh).
Is a 20W charger enough? Under the heading "Earlier iPhone models", Apple's support article says that to fast charge an iPhone 15 or later you need an Apple 18W or greater USB-C Power Adapter, or a comparable USB-PD adapter. For the iPhone 18 Pro models, Apple gives a time only with a 60W-capable AVS adapter. With 20W, the calculated lower bound is 25 minutes to 50% (iPhone 18 Pro) and 32 minutes (iPhone 18 Pro Max).
What about a bigger laptop charger? A USB-C laptop adapter that supports USB PD meets that 18W-or-greater line, but Apple gives no time for the iPhone 18 Pro models without AVS. Check the adapter's spec sheet for AVS before you count on 15 minutes.
Which cable? The support article says to use the USB-C cable that came in the box. The spec footnote asks for a 60W-capable USB-C cable.
How fast are MagSafe and Qi2 on the iPhone 18 Pro and iPhone 18 Pro Max?
Apple lists MagSafe wireless charging up to 25W and Qi2 wireless charging up to 25W for both models. The details:
- Up to 25W, which Apple calls peak power delivery, needs a MagSafe Charger with part number A3502, A3503, A2580 or A3250, and an adapter of 30W or more (15V/2.0A or higher).
- For 50% in 30 minutes, the tech specs and the support article say a 35W or higher adapter; the MagSafe Charger store page says 30W. A 35W or higher adapter covers both.
- With USB-C accessories such as wired headphones connected, MagSafe charging on both models is limited to 16W.
- If MagSafe and a USB-C cable are both connected, the iPhone charges through the cable.
Apple's 30 minutes works out to about 17 W (iPhone 18 Pro) and 22 W (iPhone 18 Pro Max) reaching the battery on average, below the 25W peak. Wireless charging can lose more on the way: Apple's MagSafe article cites an EU-mandated notice that wireless charging might use more power than wired charging.
For Qi2, the Wireless Power Consortium says the original Qi2 charges at 15W and that Qi2 25W, launched in July 2025, carries nearly 70% more power. Apple gives no Qi2 charging time, so for the 25W figure look for a charger certified as Qi2 25W.
Is the iPhone 18 Pro faster to charge than the iPhone 17 Pro?
Apple's support article gives the iPhone 17, iPhone 17 Pro and iPhone 17 Pro Max 50% in around 20 minutes with a 40W adapter or higher. The iPhone 18 Pro models take around 15 minutes, 5 minutes less, but Apple's figure needs a 60W-capable adapter with AVS. For older models, see iPhone 16 charging speed.
Why does charging slow down after 80%?
Apple says the iPhone gradually reduces the charging current as the battery nears full, and that Optimized Battery Charging (on by default) or a too-warm battery can delay or limit charging above 80%. Apple quotes only 0 to 50%. The second half is slower, and how much slower depends on these settings and on temperature; more in our articles on charging an iPhone overnight and slow iPhone charging.
How to check the charging speed of your own iPhone 18 Pro
- Start low. Apple's figure covers 0 to 50%, so start below about 20% and follow the climb to 50%. Readings above 80% tell you about the slowdown, not the charger.
- Keep the setup the same. Same cable, room temperature, and for MagSafe no USB-C accessories plugged in.
- Do the math by hand. Note the time at two battery percentages. Average power ≈ battery Wh × (end % − start %) ÷ hours. Worked example, not a measurement: an iPhone 18 Pro without a SIM tray that went from 20% to 50% in 9 minutes would give 16.76 × 0.30 ÷ 0.15 = 33.5 W.
- Or let an app do the math. Watt Charging Speed (our app) for iPhone and iPad does the same math from the battery level and your model's battery size, so it estimates the power reaching the battery. It is not a USB power meter and does not see momentary peaks. Because iOS reports the battery level in 5% steps, the first number needs up to about 10% of charging, with the app open on screen. It has the iPhone 18 Pro battery sizes from version 1.5; older versions read too low on these models.
- Check against the estimate. With a 60W-capable AVS adapter, about 34 W (iPhone 18 Pro) or 44 W (iPhone 18 Pro Max) on the way to 50% matches Apple's figure. Much less? Check the cable, the adapter's AVS support and the phone's temperature.
Questions people ask
What charging port does the iPhone 18 Pro have?
USB-C. Apple's tech specs list a USB-C connector with support for charging, DisplayPort and USB 3 (up to 10Gb/s).
Does the iPhone 18 Pro come with a charger?
No. The box holds the iPhone and a USB-C Charge Cable (1 m), with no power adapter.
Do the iPhone 18 Pro and iPhone 18 Pro Max charge at the same speed?
Apple gives both the same rounded times to 50%: around 15 minutes wired and 30 minutes with MagSafe. It does not say whether the two are exactly equal.
How much does 5 minutes of charging give?
With a compatible fast-charging adapter, Apple says 5 minutes of charging gives up to 7 hours of video playback on the iPhone 18 Pro Max. Apple gives this figure only for the iPhone 18 Pro Max.
Is it safe to leave an iPhone 18 Pro on the charger overnight?
Apple says the iPhone stops charging when the battery is full, so it is safe to leave it connected overnight; charging resumes if the level drops below 95%. More in Is it bad to charge your iPhone overnight?
Sources
- Apple — iPhone 18 Pro and 18 Pro Max Technical Specifications, checked October 26, 2026
- Apple Support — Fast charge your iPhone (published October 22, 2026), checked October 26, 2026
- Apple — iPhone 18 Pro, checked October 26, 2026
- Apple Support — How to use your MagSafe Charger with iPhone, checked October 26, 2026
- Apple — MagSafe Charger (1 m), checked October 26, 2026
- Apple — 40W Dynamic Power Adapter with 60W Max, checked October 26, 2026
- Apple Support — About Charge Limit and Optimized Battery Charging on iPhone, checked October 26, 2026
- Apple Support — Charge and maintain your iPhone battery, checked October 26, 2026
- Apple Support — Identify your iPhone model, checked October 26, 2026
- iFixit — iPhone 18 Pro and Pro Max teardown (September 20, 2026), checked October 26, 2026
- EU EPREL — Apple A3714 and Apple A3717, checked October 26, 2026
- Wireless Power Consortium — Qi wireless charging, checked October 26, 2026
- USB-IF — USB Charger (USB Power Delivery), checked October 26, 2026
- frekvens.ai — Watt Charging Speed (our app) support page (how the app estimates), checked October 26, 2026
How this article was made: Written with AI and checked against the sources above by an automated editorial step; published by Frekvens AI. No measurements of our own are used: the figures marked as calculated are estimates from Apple's published times and the battery capacities in the sources, and the charts were rendered by script from the same numbers. Apple has not sponsored or approved this article. iPhone and MagSafe are trademarks of Apple Inc., registered in the U.S. and other countries and regions. App Store is a service mark of Apple Inc.