iPhone 17 Fast Charging: Up to 40W over USB-C

iPhone 17 40W Charging Upgrade

If you have been using the same 20W chargers that became standard with the iPhone 12, the iPhone 17, iPhone 17 Pro, and iPhone 17 Pro Max now support up to 40W wired charging over USB-C. With the right charger and cable, these models can reach a 50% charge in about 20 minutes, a meaningful jump over previous generations.

Important: iPhone Air continues to support up to 20W wired charging.

How iPhone 17 Reaches 40W Speeds

The iPhone 17 family uses USB-C Power Delivery (PD) to negotiate charging speeds. When you plug in, the charger lists what it can supply and the iPhone selects the highest safe level.

• iPhone 17, 17 Pro, Pro Max: up to 40W
• iPhone Air: capped at 20W, even with a higher-wattage charger

Faster charging is reserved for the iPhone 17, 17 Pro, and 17 Pro Max; iPhone Air continues with the familiar 20W speeds..

Cable Compatibility

• Any USB-C to USB-C cable rated for 60W (3A) is enough for every iPhone 17 model.
• 100W+ (5A) e-marked cables are not required for charging the phone, though they are useful if you also charge a laptop with the same cable.
• Look for USB-IF certified cables; they are tested for safety and performance.

For a deeper dive, see our USB cables ultimate guide.

Charging Speeds in Real Use

Apple's charging curve delivers higher speeds in the 1-50% range, then tapers off to protect the battery.

• iPhone 17, 17 Pro, 17 Pro Max: stable charging close to 40W sustained, making short top-ups significantly faster.
• iPhone Air: up to 20W wired, consistent with previous generations.

iPhone 17 Wireless Charging

The iPhone 17 family also gets a wireless charging upgrade. Here is what each model supports:

• iPhone 17, 17 Pro, 17 Pro Max: up to 25W wireless on a Qi2.2 (also called Qi2 25W) charger or magnetic power bank. This is the biggest wireless jump since MagSafe launched.
• iPhone Air: up to 20W on MagSafe and up to 20W on Qi2 wireless chargers. (Verified 2026-05-05 against apple.com/iphone-air/specs/. The "15-20W" range used in the original blog post was imprecise; both MagSafe and Qi2 cap at 20W flat on iPhone Air.)

To take advantage of 25W wireless on the iPhone 17 Pro models, you need a Qi2.2-certified charger or magnetic power bank. Standard MagSafe chargers will still work, but they cap at 15W. See our wireless power banks for Qi2 and MagSafe-compatible options.

Requirements for iPhone 17 Fast Charging

A USB-C PD 3.1 (or newer) charger rated 40W or higher

• For iPhone 17, 17 Pro, 17 Pro Max: a 40W to 65W charger gives the phone room to negotiate its ideal profile.
• For iPhone Air: anything above 20W will not increase speed.

A USB-C to USB-C cable rated for 60W (3A) or higher>

• 100W (5A) e-marked cables are optional.
• USB-IF certified is preferred.

Smart charging habits

• Plug directly into the wall.
• Remove thick cases during fast charging.
• Start your charge between 1% and 50% for the fastest boost.

Belkin's BoostCharge Pro USB-C wall chargers and 100W USB-C cables meet all of the above.

Benefits in Daily Use

• iPhone 17 family: a 10-15 minute top-up gives a much bigger battery boost than older models.
• iPhone Air: still benefits from quick charging, capped at 20W.
• One-charger travel kit: a compact PD charger can fast-charge your iPhone 17 Pro and still power a laptop.
• Battery health: Apple's charging curve avoids the stress of extreme wattages while still being faster than older models.

Compatibility with Existing Chargers

• 20W chargers: work with every model. iPhone Air gets its full speed; iPhone 17 family will charge slower than 40W.
• 30W chargers: work for iPhone 17, 17 Pro, and 17 Pro Max but will not enable the full 40W ceiling.
• 65W and higher chargers: fully supported and safe. PD ensures the iPhone only draws what it needs.

iPhone Charging Evolution