How to Charge an iPhone With Another iPhone

Charging one iPhone using another sounds like a neat trick — and in some cases, it genuinely works. But the answer depends heavily on which iPhone models you have, what software they're running, and what you actually expect from the process. Here's what's real, what's limited, and what determines whether this works for you.

The Feature That Makes This Possible: iPhone-to-iPhone Charging

Apple introduced reverse wireless charging for iPhones with the iPhone 15 series — but with an important caveat. It's not called reverse wireless charging in Apple's terminology. Instead, Apple allows the iPhone 15 (and later models) to share power with other devices via its USB-C port, acting as a power source rather than just a receiver.

This means you can plug a USB-C to USB-C cable between two compatible iPhones, and the one with more battery can charge the one that's nearly dead.

Before that, iPhone-to-iPhone charging simply wasn't possible through any official method.

What You Actually Need to Make This Work

Not every iPhone combination supports this. The requirements are specific:

• The "donor" iPhone (the one giving power) must be an iPhone 15 or later — these are the first iPhones with USB-C that can output power to another device.
• The "recipient" iPhone (the one being charged) can be any iPhone that accepts USB-C charging — which again means iPhone 15 or later.
• You need a USB-C to USB-C cable that supports data and power transfer (not all USB-C cables are created equal — cheap cables may not carry enough power reliably).

If either phone uses a Lightning connector, iPhone-to-iPhone wired charging won't work. There are no Lightning-to-Lightning or Lightning-to-USB-C power-sharing cables that enable this natively.

How Much Charge Can You Actually Transfer?

This is where expectations need calibrating. When one iPhone charges another via cable, the power output is relatively modest — it's not the same as plugging into a wall adapter. Think of it as a slow, emergency top-up rather than a fast charge.

The donor iPhone's battery will drain to provide power. There's no setting to cap how much it gives, so you'll want to keep an eye on both devices. Practically, this is most useful when:

• One phone is at 1–5% and you need it functional for a call or navigation
• You're somewhere without access to a wall outlet or portable battery
• You have a USB-C cable with you

It's not a replacement for a power bank, and it won't rapidly restore a dead phone. ⚡

What About Wireless Charging Between iPhones?

You may have heard about reverse wireless charging — where one device acts as a Qi wireless charging pad for another. Some Android phones have supported this for years.

Apple has not enabled reverse wireless charging in a way that lets one iPhone wirelessly charge another iPhone. The MagSafe system on iPhones is designed for receiving wireless power, not transmitting it to another iPhone. So if you're hoping to stack two iPhones together and transfer charge without a cable, that's not currently a supported feature on any iPhone model.

Older iPhones and Alternative Workarounds

If you're working with iPhones that predate the iPhone 15, direct iPhone-to-iPhone charging isn't on the table. Some workarounds people attempt:

• Portable battery packs (power banks): These are the practical solution — charge the power bank from one phone's cable and use it to top up the other. It's not direct phone-to-phone, but it covers the same real-world need.
• Shared wall chargers: If both phones are Lightning or both are USB-C, a multi-port charger solves the problem without any clever workarounds.
• Car chargers and USB hubs: In a vehicle, these can charge multiple devices simultaneously.

None of these are iPhone-to-iPhone in the strict sense, but they address the underlying situation: one person has power access and another doesn't.

The Variables That Determine Your Outcome 🔋

Whether iPhone-to-iPhone charging is useful to you depends on a few converging factors:

• Which iPhone models you own — this is the hard cutoff. iPhone 15 or later on both ends is non-negotiable for wired power sharing.
• Whether you carry a USB-C cable — the feature is useless without the right cable in your bag or car.
• How much battery the donor phone has — giving power away from a phone that's already at 40% can leave both devices under-charged.
• What you need the charge for — if you need 10 minutes of GPS or a quick call, even a small top-up from another iPhone might be enough. If you need hours of use, it likely won't cut it.
• iOS version — Apple can adjust how this feature behaves through software updates, so running a current iOS version on both phones generally ensures the feature works as intended.

A Note on Third-Party Accessories and Claims

You may find cables or adapters online that claim to enable iPhone-to-iPhone charging for older models. Treat these with caution. Lightning ports on older iPhones were not designed to output power, and unofficial accessories that claim otherwise either don't work as advertised or may carry risks to the device's battery and charging circuit.

Sticking to MFi-certified cables (Made for iPhone) and Apple-approved accessories is the safest path when dealing with anything connected to your iPhone's charging port.

The right approach for your situation depends on which iPhones you have, what scenario you're solving for, and how often this need comes up in your daily routine.