iPhone 16 Pro Max Charging Speed Test Proves 45W Rumor Was Wrong

While a Chinese regulatory filing showed that all iPhone 16 models are rated for up to 45W charging speeds, tests have since shown that the devices do not actually charge this fast. However, there are still improvements.

iphone 16 pro colors 1
ChargerLAB last week tested the iPhone 16 Pro Max with a variety of Apple and third-party chargers, and it found that the device achieved maximum sustained charging speeds of around 30W. In one image, the website showed the iPhone 16 Pro Max reaching a peak charging speed of 37W with Apple's 140W USB-C power adapter, but it is unclear how long the device kept charging at that speed. Overall, this seems to be an improvement over the reported 27W peak charging speed for iPhone 15 Pro models, but it is clear that iPhone 16 models are not actually reaching the theoretical 45W ceiling that was rumored.

ChargerLab iPhone 16 Pro Max Large
PhoneArena saw similar results with the standard iPhone 16. In its review last week, it said the device reached a peak charging speed of 38W only when it was "under extremely heavy loads such as benchmark testing or playing games." The website said the iPhone 16 achieved a sustained charging speed of closer to 20W.

Apple merely says that all iPhone 16 models can achieve up to a 50% charge in around 30 minutes with a 20W or higher USB-C charger, which is exactly the same claim that it advertised for all iPhone 15 models.

All in all, just because all iPhone 16 models safely support the USB-C Power Delivery 3.0 protocol of 15V/3A = 45W, it has been proven that the devices do not actually charge at 45W speeds. The rumor was wrong, or at least misinterpreted. However, modestly faster charging speeds still seem to occur in certain scenarios.

Related Forum: iPhone

Popular Stories

Apple Creator Studio

Apple Introduces New 'Creator Studio' Bundle of Apps for $129 Per Year

Tuesday January 13, 2026 6:11 am PST by
Apple today introduced a new Apple Creator Studio bundle that offers access to six creative apps, as well as exclusive AI features and content, as part of a single subscription. In the U.S., pricing is set at $12.99 per month or $129 per year. Here are the six apps included with an Apple Creator Studio subscription:Final Cut Pro on the Mac and iPad Logic Pro on the Mac and iPad Pixelmator...
Verizon New

Verizon is Down: iPhones Show 'SOS' Mode Due to Network Outage [Resolved]

Wednesday January 14, 2026 10:18 am PST by
Verizon is experiencing a major outage across the U.S. today, with hundreds of thousands of customers reporting issues with the network on the website Downdetector. There are also complaints across Reddit and other social media platforms. iPhone users and others with Verizon service are generally unable to make phone calls, send text messages, or use data over 5G or LTE due to the outage....
iOS 26

Here's What's New in iOS 26.3 So Far

Monday January 12, 2026 1:15 pm PST by
Apple today seeded the second beta of iOS 26.3, nearly a month after the first beta. So far, the update includes a couple of new features for iPhones. iOS 15.3 through iOS 18.3 were all released in late January over the years, so it is thereby likely that iOS 26.3 will be released towards the end of this month as well. The update is compatible with the iPhone 11 series and newer. Below,...
iPhone Top Left Hole Punch Face ID Feature Purple

New Leak Reveals iPhone 18 Pro Display Sizes, Under-Screen Face ID, and More

Wednesday January 14, 2026 7:09 am PST by
While the iPhone 18 Pro models are still around eight months away, a leaker has shared some alleged details about the devices. In a post on Chinese social media platform Weibo this week, the account Digital Chat Station said the iPhone 18 Pro and iPhone 18 Pro Max will have the same 6.3-inch and 6.9-inch display sizes as the iPhone 17 Pro and iPhone 17 Pro Max. Consistent with previous...
maxresdefault

Apple Confirms Google Gemini Will Power Next-Generation Siri This Year

Monday January 12, 2026 7:38 am PST by
In a statement shared with CNBC today, Apple confirmed that Google Gemini will power the next-generation version of Siri that is slated to launch later this year. Subscribe to the MacRumors YouTube channel for more videos. "After careful evaluation, we determined that Google's technology provides the most capable foundation for Apple Foundation Models and we're excited about the innovative...

Top Rated Comments

Lounge vibes 05 Avatar
17 months ago

Wasn’t it first a rumor and then supposedly later “confirmed” and “official” or whatever? So why are we back to calling it a rumor and not just false advertising?
you can't call "false advertising" on something that wasn't and still isn't advertised at all.
Score: 27 Votes (Like | Disagree)
contacos Avatar
17 months ago
I’ll be fine. I still use my 5W charger over night ?
Score: 22 Votes (Like | Disagree)
contacos Avatar
17 months ago

Never charge your phone overnight.
Optimized charging
Score: 20 Votes (Like | Disagree)
ikjadoon Avatar
17 months ago
https://forums.macrumors.com/threads/iphone-16-battery-capacities-revealed.2437059/post-33417816

If anyone wants the explanation ^^

TL;DR: Some rumor sites found the real Apple.com page showing that iPhone 16s support the 15V3A (45W max) USB-IF profile. They immediately assumed that the iPhone would max out the profile.

No, it's simply because even just 28W (+1W only!) is not possible with the lower profile (9V3A = 27W): Apple did slightly increase charging speeds over 27W → thus, Apple was forced to enable the 15V*3A profile. But Apple supporting the 15V*3A profile does not mean iPhones must use all 3A.

The profile is just named "15V3A" to indicate the maximum:

9V@3A profile: >15W to 27W max (3A)
15V@3A profile: >27W to 45W max (3A)

Apple had to move to 15V to increase charging speeds beyond 27W.

ELI5: imagine if Apple.com store suddenly showed 200-lb-rated caster wheels for the Mac Pro, vs the older 100-lb-rated casters. Does that mean the next Mac Pro WILL weigh 200 pounds?! No. It may just be 105-lb, but even those +5lb would not be allowed on the 100-lb-rated casters.
Score: 18 Votes (Like | Disagree)
I7guy Avatar
17 months ago
For me charging with the 20W brick is fast enough.
Score: 17 Votes (Like | Disagree)
rotvaldi Avatar
17 months ago
Thanks I was going to trade in my 15P for a 16PM but I’ll wait till 17PM
Score: 11 Votes (Like | Disagree)