Latest Teardown of Apple MagSafe Battery Pack for iPhone 12 Series
The new iPhone 12 series adopts the new magnetic wireless charging, and designed two wireless charging accessories for iPhone 12 series, MagSafe wireless charger and MagSafe Duo Charger. On July 14, Apple released a new product, called “MagSafe external battery.”
Actually, it is just a power bank with MagSafe. And the price will be $99, which is a little bit expensive.
Next, we gonna disassemble this MagSafe Battery Pack to see why it can be $99.
1. Appearance of Apple MagSafe Battery Pack
The design of the packaging is very simple. The front of the packaging is printed the product and it is the same size as actual product.
Turn it back. And it will show you how to use the battery pack.
Compatible with MagSafe for iPhone with the latest version of iOS. That would be 14.7 or above.
The other side is the specification label.
There is a one-time strip beside the hook for easy opening of the package.
The drawer design of the packaging can be easily pulled out by hooks.
Everything inside the box, including MagSafe battery pack, manuals, and warranty cards.
A paper protective film is used to protect the MagSafe battery pack from scratches.
The design of the Apple MagSafe battery pack is also very simple. It adopts the plastic and pure white case. The edges are rounded. It’ll be comfortable when you hold it and reduce the scratches. The matte surface can also reduce the fingerprint.
The other side that attaches to the phone is gray. The white circle in the middle is the wireless charging area and has built-in magnets, which can easily attract your phone.
Product specifications are printed in the lower area.
Product Name: MagSafe battery pack
Input: 5-9V3A Max
Rated capacity: 1460mAh / 11.13Wh
Battery type: Lithium battery
This product adopts Lightning port and has an LED next to it.
Length is about 95.8mm (3.77 inches).
The width is about 64.2mm (2.53 inches).
The thickness is about 11.3mm (0.45 inches).
The width is almost the same as the iPhone 12 mini.
The length is a bit short. So that it will not affect the camera of the iPhone 12 mini, and the user experience will be better.
That’s how you hold it.
The weight is about 113g (3.99 oz).
For iPhone 12 mini users, the thickness of the iPhone and the battery pack is 18.72mm (0.737 inches).
The weight is about 247g (8.71 oz).
For iPhone 12 users, the thickness of the iPhone and the battery pack is 19.38mm (0.762 inches).
The weight is about 286g (10 oz).
For iPhone 12 Pro users, the thickness of the iPhone and the battery pack is 19.13mm (0.753 inches).
The weight is about 301g (10.61 oz).
For iPhone 12 Pro Max users, the thickness of the iPhone and the battery pack is 18.84mm (0.741 inches).
The weight is about 339g (11.95 oz).
It can be easily attracted and display the Magsafe’s pop-up animation after upgrading to iOS14.7.
Not only can you see the battery capacity of your iPhone, but it can also display the capacity of the battery pack.
The indicator light is in orange when wireless charging.
Use Apple’s original 20W charger to charge the MagSafe battery pack. The input measured by the ChargerLAB POWER-Z KM001C is 8.95V 1.88A 16.77W, which is really fast for low capacity power bank.
And the indicator light is also orange currently.
2. Teardown of Apple MagSafe battery pack
Open the cover along the gap. The wireless charging coil and the magnet that attracts the phone are under the cover.
Copper foil, NFC coil and capacitive sensing are inside the cover.
The NFC coil is welded to the NFC chip.
Close-up of the capacitive sensing, use to detect the distance between the phone and the battery.
The internal coil and PCB of the battery pack are arranged alternately to reduce the thickness.
The shielding cover on the motherboard can be removed.
The magnet ring around the upper coil is not glued and fixed, which is used to attract the iPhone.
There is also foam under the magnet ring for protection.
We can see it consists of 16 small magnets.
The thickness of the magnet ring and the metal sheet is 1.7mm (0.066 inches).
The diameter is 56mm (2.2 inches).
The total weight is about 9.6g (0.33 oz).
Remove the six screws that fixed the PCB. Then, continue to remove the wireless charging coil and PCB. There are two batteries underneath.
The two batteries are connected in series.
Close up of the battery. Model is A2362. Its voltage is 7.62V, and its total energy is 11.13Wh.
The charging limit voltage is 8.7V. The battery capacity is 1460mAh. The manufacturer is Sunwoda Electronic.
The battery pack is connected to the battery protection board through a flexible flat cable.
Close-up of the special connector, used to connect PCB. The positive and negative poles are widened, and the edges are communication contacts.
The two batteries are connected to the protection board by spot welding.
Close-up of the spot welding.
A battery fuel gauge chip is on the protection board, from Texas Instruments BQ28Z610 and integrated protection function.
Continue to remove the battery. Metal heat sink and copper foil are attached to the shell.
And there are two metal shields on the PCB, with a positioning magnet in the middle.
The backside is completely attached to a metal plate to ensure heat dissipation.
The shielding cover can be easily removed, which makes it more convenient to observe the PCB.
The interior of the Lightning port is silver, which is durable.
The inductive coil is next to it, covered with tape.
Two LED indicators.
Firstly, look at the master control for wireless charging on the left.
There are two synchronous buck converters, which come from Texas Instruments TPS62162 and have fixed output of 3.3V 1A.
The middle one is linear regulator, which comes from Texas Instruments TPS70933 and supports output of 3.3V 150mA.
The biggest one is the master MCU of STMicroelectronics, with built-in 120MHz high-performance ARM of M4 core.Model is STM32L4S5ZI.
This one is the interface control chip from NXP 1612A1, used for USB PD fast charging.
This chip is Cypress CYPD2104, which is responsible for adjusting the adapter output voltage
to meet the needs of wireless chargers.
There is also a Cypress PSoC coprocessor CY8C4745.
The buck-boost circuit and drive circuit of wireless charging coil are on the right.
This is the synchronous boost converter from Texas Instruments. It can power the wireless charging with the boost inductor next to it.
There is also a Schottky diode next to the chip, used to improve conversion efficiency.
3R3 boost inductor.
This big black chip is the buck-boost controller, which comes from Maxim’s MAX77964.
It supports input of 23V and output current of 3.2A, which is suitable for charging two lithium batteries. And it also supports reverse buck and output, which can power the external devices.
The 2R2 inductor is next to it, used for battery charging and discharging.
It is marked with 4UAF0B3D9.
Marked with NPB1FA.
Here is the customized wireless charging controller, which comes from STMicroelectronics STWPSPA1. It has built-in MOS tube and driver to reduce components.
Two MOS tubes are next to it and form a full bridge with the two built-in switch tubes of this master control chip, used to drive the coil.
Close-up of four white NPO resonant capacitors.
There is a conductive foam on edge.
Finally, the coil is wound with Litz wire and fixed by a magnetic isolator.
OK, that’s all for the Teardown of Apple MagSafe Battery Pack. Let’s take a “family portrait.”
Teardown Summary of ChargerLAB
Apple MagSafe battery pack still maintains the simple design style compared with the MagSafe wireless chargers. I think the Apple MagSafe battery pack is most suitable for iPhone 12 mini users, cause its width is perfectly matched with iPhone 12 mini, and can double the battery life of 12 mini. As for other users, 5W is pretty slow. Maybe the third-party product will be more cost-effective.