How Much mAh to Charge an iPhone & What's the Right Capacity?

Your phone always seems to die at the worst possible time. Right before the concert. Mid-Uber ride home. A power bank fixes that, but only if it's actually got the juice to finish the job.

That's where mAh comes in. It's the number that tells you how big a power bank you need to fully charge your iPhone, not just top it off. Below, Casely breaks down the ideal capacity for every iPhone model, from the OG iPhone 8 all the way up to the iPhone 18 Pro Max and the brand-new iPhone Duo.

How Much mAh Do I Need to Charge My iPhone?

Below, we break down how much battery capacity you need from a power bank in order to charge an iPhone. It’s recommended to have around 1.5 times the phone’s capacity in order to guarantee you can get one full charge.

iPhone 8

Ensure your iPhone 8 stays powered and ready to go, and select a power bank with the correct charge capacity. The iPhone 8, with its battery capacity of 1821 mAh, requires a power bank that can deliver around 2731.5 mAh to guarantee a complete charge.  

This capacity allows you to count on your device receiving a full charge before the power bank itself requires replenishing. It's a practical and reliable solution for various situations, such as travel, outdoor activities, or any time you need that extra charge to stay connected.  

iPhone X

When it comes to keeping your iPhone X fully charged and ready for action, selecting the suitable power bank capacity is crucial. With an iPhone X sporting a 2716 mAh battery, opting for a power bank of around 4074 mAh ensures you can provide a complete charge to your device.

This configuration offers a thorough power-up for your iPhone X, so you can rely on your power bank to keep your device running while you're on the move.  

iPhone 11

When it comes to the iPhone 11 and its 3110 mAh battery capacity, choosing the right power bank is essential to ensure your device stays charged and ready for action. Opting for a power bank with a charge capacity of around 4665 mAh is the key to meeting your charging needs effectively.

With this setup, you can count on your iPhone 11 staying charged up with an extra charge available. Whether you're embarking on a long day at work, heading out for a weekend getaway, or traveling, this power bank capacity ensures that your iPhone 11 remains powered up by giving you an extra charge to get you through between stops.

iPhone 12

If you're rocking the iPhone 12, you're looking at a battery capacity of 2815 mAh. To ensure a full charge, a power bank with a charge capacity of approximately 4222.5 mAh is recommended. 

iPhone 13

The iPhone 13, with a battery capacity of 3227 mAh, is a powerhouse. To keep it charged and ready for an extended period, a power bank with a charge capacity of about 4840.5 mAh is your ideal companion. With this setup, you can enjoy over 1.5 total charges for your device.

iPhone 14

The iPhone 14 boasts a robust 3279 mAh battery, making it an impressive power-packed device. To ensure your iPhone 14 stays charged and ready for whatever your day brings, opt for a power bank with a charge capacity of around 4918.5 mAh.

With this power bank, you can have a reliable power source wherever you go. Having an extra charge available can help you get between charges much more easily. As a result, your device remains connected and ready for any task.

iPhone 15

Fast forward to the iPhone 15, equipped with a substantial 3349 mAh battery, ready to meet your power-hungry demands. To guarantee that your iPhone 15 remains charged and at your service, a power bank with a charge capacity of about 5023.5 mAh is the ideal companion.

With this power bank, you can count on an extra charge for your advanced iPhone 15, ensuring you're always powered up and prepared for your daily adventures. 

iPhone 16 & iPhone 16 Plus

The iPhone 16 comes with a 3561 mAh battery, while the larger iPhone 16 Plus steps things up to 4674 mAh. To guarantee a full charge on the iPhone 16, look for a power bank with around 5341.5 mAh of capacity. The iPhone 16 Plus needs closer to 7011 mAh to hit that same 1.5x buffer.

iPhone 16 Pro & iPhone 16 Pro Max

The iPhone 16 Pro's 3582 mAh battery pairs well with a power bank around 5373 mAh. The iPhone 16 Pro Max holds 4685 mAh, Apple's biggest battery at the time, so aim for a power bank closer to 7027.5 mAh to fully top it off with some charge left over.

iPhone 17 & iPhone Air

The iPhone 17 packs a 3692 mAh battery, so a power bank around 5538 mAh gets you a full charge with room to spare. The iPhone Air trims down to 3149 mAh for its slim build, meaning a smaller 4723.5 mAh power bank still does the job.

iPhone 17 Pro & iPhone 17 Pro Max

The iPhone 17 Pro's 4252 mAh battery is best matched with a power bank around 6378 mAh. The iPhone 17 Pro Max became the first iPhone to break 5000 mAh, packing a 5088 mAh battery that calls for a power bank closer to 7632 mAh.

iPhone 18 Pro & iPhone 18 Pro Max

Apple's newest lineup brings the iPhone 18 Pro in at 4056 mAh and the iPhone 18 Pro Max at 5391 mAh, according to Apple's own energy labels. That puts the ideal power bank capacity at around 6084 mAh for the 18 Pro and 8086.5 mAh for the 18 Pro Max. Casely's iPhone 18 Pro cases and iPhone 18 Pro Max cases are ready for both, so your new phone stays protected from day one.

iPhone Duo

Apple's first foldable, the iPhone Duo, runs on a dual-battery system rated at 4700 mAh combined, per PhoneArena. To fully top it off, look for a power bank with around 7050 mAh of capacity. Casely's iPhone Duo cases are built to protect the fold.

FAQs

How Many Times Will 50000mAh Charge an iPhone?

A 50000mAh power bank offers substantial capacity, keeping your iPhone juiced up for multiple cycles. Its potential varies depending on the iPhone model and usage, but it ensures you stay powered during critical moments on your adventures. It will provide you with many charges and is a good choice for long trips.

How Many Times Will 20000mAh Charge an iPhone?

A 20000mAh power bank provides a portable yet powerful charging solution, delivering multiple charges for your iPhone. It's the perfect fit for daily use and shorter journeys, balancing convenience and capability. How many times you can charge your phone depends on what model you have, but you can certainly expect several charges out of a 20000mAh power bank.

Which is Better: 10000mAh or 20000mAh?

Understanding the purpose of different power bank capacities is crucial for ensuring reliable on-the-go power. The 10000mAh option offers a portable boost for occasional top-ups, while the 20000mAh version suits extended journeys and remote locations without compromising portability. Choose based on your mobility and charging needs.  

Need Help Keeping Your Phone Charged? Shop Casely!

When your iPhone is your lifeline, knowing your mAh capacity is the key to a seamless, uninterrupted mobile experience. With this knowledge and the correct power bank, you'll never have to worry about a drained battery during a crucial moment. So, make the right choice, stay powered up, and stay connected!

If you're searching for top-notch power solutions to keep your iPhone charged, look no further than Casely. Get your hands on a new MagSafe case today. Casely power pods are meticulously designed to ensure your device stays powered up on the go so you can stay connected, no matter where your adventures take you.