Home / Technology / iPhone 12 MagSafe battery pack stuff: Capacity, speed, more

iPhone 12 MagSafe battery pack stuff: Capacity, speed, more

In a surprising launch, Apple debuted its MagSafe battery pack for the iPhone 12 series with a pure white design. Let’s dive into all the details of the new accessory, such as the capacity and how much charging it can offer, charging speed, simultaneous and reverse charging, what’s in the box and more.

There has been a nine-month wait for Apple’s MagSafe battery pack, and while we’ve seen a number of third-party MagSafe-compatible alternatives, Apple’s listing launches the first to be MagSafe official.

The official MagSafe battery at a price of $ 99 comes with other benefits, such as Apple̵

7;s pure design (only in white), up to 15 W charging speeds, simultaneous review and reverse charging and more.

iPhone 12 MagSafe battery pack goodies

What’s in the box?

No surprise here, but the only thing in the box is the MagSafe battery pack itself. Apple recommends charging it with a 20 W or higher power adapter via the lightning port.

Apple also recommends fully charging the battery pack before first use.

How it works

Like Apple’s smart battery cases, the MagSafe battery pack automatically starts charging the iPhone 12 when you attach it to the back of the device with a charging status displayed on the lock screen.

Status icons also appear for the new battery pack in Today View and widgets with iOS 14.7.


Interestingly, while the MagSafe battery pack offers up to 15 W charging speeds, it only happens when connected to a 20 W or higher power supply. When using the battery pack while on the go, Apple says it will charge the iPhone 12 at 5W.

Battery capacity

TL; DR: Based on all the specifications plus and an efficiency assumption below, we think it’s likely that the Apple MagSafe Battery will offer just under a full iPhone 12 charge and possibly closer to a full charge for the iPhone 12 mini.

Apple is often vague with details about battery specifications in product listings. For example, with something like the iPhone 11 Smart Battery Case, Apple says it “delivers up to 50% longer battery life.”

However, the MagSafe battery pack does not provide any guidance on what to expect as far as charging capacity. This may be for some reason, including the fact that it works with all four iPhone 12 models, all of which have different sized batteries, and we are talking about wireless charging that includes some loss of power during transmission.

But Apple revealed raw capacity and power specifications in a photo of the battery pack:

  • 1460mAh, 7.62V, 11.13Wh (can be two 1460mAh cells of around 3.81V for 11.13Wh in total)
  Apple MagSafe Battery Pack Things - Battery Capacity

While the raw 1460mAh specification may initially sound low when compared to other companies offering around 5000mAh or even the internal 2815mAh on the iPhone 12/12 Pro, there are two things to keep in mind.

First, Apple’s MagSafe battery is designed with 7.62V, almost twice as high voltage as the options on the market. Second, the capacity to deliver power over time – wattimer (Wh) is a better calculation to understand what Apple can deliver here. The 11.13Wh of the MagSafe battery is compared to the iPhone 12/12 Pro batteries which have 10.75Wh.

And the iPhone 12 mini has an 8.57Wh battery with the iPhone 12 Pro Max with a 14.13Wh battery. Long story short, if Apple has high efficiency (around 70-80%), after some energy loss from wireless transmission, the new MagSafe battery could possibly provide near full charge for the iPhone 12 mini, just under a full charge for 12 / Pro and slightly less than for 12 Pro Max.

Simultaneous review and reverse charging

A new support document describes how simultaneous charging of the iPhone and the battery pack works:

If both iPhone and MagSafe battery pack need to be charged, you can charge them at the same time. Attach the MagSafe battery pack to the iPhone, and then connect the MagSafe battery pack to an AC adapter. Using a power adapter of 20 W or higher, the MagSafe battery pack can charge your iPhone with up to 15 W of charging power.

More interesting is what sounds like reverse wireless charging from iPhone 12 to MagSafe battery pack (which would be a first):

You can also charge both if you connect the MagSafe battery pack to the iPhone, and then connect the iPhone to a power source. You may want to charge this way if you need to connect your iPhone to another device while charging, such as using wired CarPlay or transferring photos to a Mac.

We have contacted Apple for clarification on the reverse charge feature.


Additional tips and details from Apple in the accessory support document include:

  • The MagSafe battery pack was designed to be attached directly to your iPhone or through a MagSafe case. If you use another case that contains items such as credit cards, you must remove them before charging them with the MagSafe battery pack.
  • Your iPhone may get a little warmer while charging. If the battery becomes too hot, the software may limit charging above 80% to extend battery life. Your iPhone will recharge when the temperature drops. Try moving your iPhone and charger to a cooler place.
  • The MagSafe battery pack includes a charge management function to maintain the health of the battery in cases where the MagSafe battery pack is connected to power for extended periods.
  • If you have turned on optimized battery charging, you will see a warning on the lock screen that says when the iPhone will be fully charged. If you need to have your iPhone fully charged before, you can tap and hold the alert, then tap Charge now.
  • If you hold the iPhone in a leather case while charging with the MagSafe battery pack, the case may show imprints from the compression of the leather. This is normal, but if you are concerned about this, we suggest you use a non-leather bag.

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