The iPhone XS Max has the most RAM and largest battery capacity of any iPhone

When it comes to specs, Apple doesn’t officially disclose the amount of RAM and battery capacity for their mobile devices. Perhaps it is to keep things simple and usually, the amount of battery capacity doesn’t necessary represent real world battery life. iPhones in general are very power efficient considering they come with much smaller batteries than its Android rivals.

If you want to look up the nitty-gritty details of the new iPhone XS, XS Max and XR, we’ve finally gotten our answers from its TENAA certification listing in China. As you would expect with any large screen device, the iPhone XS Max has the most RAM and battery ever fitted on an iPhone.

On last year’s iPhone models, Apple included 3GB of RAM for the iPhone X and iPhone 8 Plus. For 2018, the iPhone XS Max is getting 4GB of RAM and previously, you could only find that much RAM on the iPad Pro. In terms of juice, the iPhone XS Max is listed with a 3,174mAh battery.

Yes, it doesn’t sound a lot but this is the biggest battery ever on an iPhone. As a comparison, below is the battery capacities for past iPhone Plus models.

iPhone XS Max – 3,174mAh
iPhone 8 Plus – 2,691mAh
iPhone 7 Plus – 2,900mAh
iPhone 6s Plus – 2,750mAh
iPhone 6 Plus – 2,915mAh

If you’re thinking of getting the smaller iPhone XS, you’ll be happy to know that Apple is also giving it 4GB of RAM, which is 1GB more than last year’s iPhone X. This is quite a significant change as usually Apple puts less RAM on its smaller model. For example, the iPhone 8 Plus and iPhone 7 Plus came with 3GB of RAM while the smaller iPhone 8 and iPhone 7 gets just 2GB of RAM.

In terms of battery, the iPhone XS has a 2,658mAh capacity and it’s smaller than the iPhone X which came with a 2,716mAh unit. Despite the downsize, Apple reckons that it has longer battery life, and that’s partly due to its more efficient 7nm Apple A12 Bionic chip and iOS 12. During the iPhone XS presentation, Apple says that the iPhone XS offers 30 minutes longer battery life while the XS Max can last up to 1.5 hours longer than the iPhone X.

Meanwhile, the iPhone XR comes with just 3GB of RAM but it is listed with a 2,942mAh battery which is still pretty generous. This is expected to be the iPhone with the best battery life considering it doesn’t push Full HD resolution and Apple says it can last 1.5 hours longer than the iPhone 8 Plus. If you look at Apple’s comparison sheet, the iPhone XR is rated to last up to 15 hours of internet usage and up to 16 hours of video playback, which is about 1-2 hours more than the iPhone XS Max.

Like last year’s model, these new models can support fast charging but you’ll need to purchase a USB-C PD charger and a USB-C to Lightning cable. This setup is rated to give you up to 50% charge in 30 minutes. Unfortunately, Apple is still bundling a slow 5W charger in the box. The new iPhone XS, XS Max and XR also support wireless charging and it works with any compatible Qi Wireless charger in the market.

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