The iPhone 18 Pro may be faster but it also comes with a potential battery downgrade

(Image credit: Tom's Guide/Apple) The iPhone 18 Pro and iPhone 18 Pro Max are finally here. Surprisingly, there is still information we don't know yet, including battery size (something Apple doesn't share) and how much better the A20 Pro chipset is compared to the A19 series.Two different leaks may have given us some of that information. The first is a new Geekbench listing that appears to show how the A20 Pro works in the iPhone 18 Pro spotted by X user never_released. iPhone 18 Pro Max HANDS ON: This Camera Is a Big Deal - YouTube Watch On If the results from this listing are typical, the single core of 4,719 and a multi-core 12,677 show that the A20 is about 25% faster than the A19 silicon. In its press release, Apple claims the A20 Pro has 50% more memory bandwidth and 40% faster than the A19 Pro. Swipe to scroll horizontally A20 vs A19 Phone Processor Geekbench results iPhone 17 Pro A19 Pro 3834 / 9988 iPhone 17 Pro Max A19 Pro 3871 / 9968 iPhone 18 Pro (leak) A20 Pro 4719/12677 M5 MacBook Pro 14-inch M5 4288/17926 It's not quite 40% better, but the A20 Pro is still a significantly more powerful chip. In fact, I looked at our testing for the M5 chip, and it compares very favorably to Apple's M5 chipset.We've argued before and the A20 Pro seems to prove it, there is no reason Apple couldn't run its laptops on its own phone chips. The proof is in the MacBook Neo, but things could get even more powerful.Now, this is all said with the caveat that Geekbench listings can be faked, and we have the iPhone 18 Pro in hand right now. We're sending the new iPhones to our testing lab where we'll put the phones through our own series of tests.A battery downgrade? (Image credit: Shutterstock)Some of the imagery and press releases from Apple claimed that the battery in the iPhone 18 Pro and Pro Max is larger than the one in the iPhone 17 Pro models. It's hard to prove because Apple doesn't list battery size in its technical specifications, at least in the US.Sign up to the Tom's iGuide weekly newsletter with coverage on everything from product launches to software updates, this is your go-to source for the latest updates on all the best Apple content.In the EU, the company does list the capacity. MacRumors spotted the capacities for the SIM tray versions of the iPhone 18 Pro.iPhone 18 Pro: 4,056 mAhiPhone 17 Pro: 4,252 mAhiPhone 18 Pro Max: 5,391 mAhiPhone 17 Pro Max: 5,088 mAh Based on those numbers, that's a 1.7% increase for the Pro and almost a 12% increase for the Pro Max.I've seen comparisons to the eSIM version of the iPhone 17 Pro, which has a larger capacity compared to the SIM version. The eSIM iPhone 17 Pro comes with a 4,252 mAh battery that is bigger than the physical SIM version.Meanwhile, the iPhone 17 Pro has the same 5,088 mAh in the eSIM version.That all said, even if the battery is slightly smaller or only a bit bigger, the gains in battery life will likely come from the new A20 chipset and its expected performance and efficiency upgrades.From what we can tell, the eSIM capacities for the iPhone 18 Pro models have not been released yet. Follow Tom's Guide on Google News and add us as a preferred source to get our up-to-date news, analysis, and reviews in your feeds. More from Tom's GuideiPhone Duo hands-on: Apple nailed it — and just put everyone else on noticeApple Event recap — Hands-on with the iPhone Duo and all the big announcementsApple's just extended free access to emergency satellite communication for another year — it's the third time this has happened Scott Younker is the West Coast Reporter at Tom’s Guide. He covers all the lastest tech news. He’s been involved in tech since 2011 at various outlets and is on an ongoing hunt to build the easiest to use home media system. When not writing about the latest devices, you are more than welcome to discuss board games or disc golf with him. He also handles all the Connections coverage on Tom's Guide and has been playing the addictive NYT game since it released.Something to share? Send secure tips on Signal: scyo1.55.