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Returns
Eligible for Return, Refund or Replacement within 30 days of receipt
Returnable Yes
Resolutions Eligible for refund or replacement
Return Window 30 days from delivery
Refund Timelines Typically, an advance refund will be issued within 24 hours of a drop-off or pick-up. For returns that require physical verification, refund issuance may take up to 30 days after drop-off or pick up. Where an advance refund is issued, we will re-charge your payment method if we do not receive the correct item in original condition. See details here.
Late fee A late fee of 20% of the item price will apply if you complete the drop off or pick up after the ‘Return By Date’.
Restocking fee A restocking fee may apply if the item is not returned in original condition and original packaging, or is damaged or missing parts for reasons not due to Amazon or seller error. See details here.

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Anker 521 Magnetic Battery (PowerCore Magnetic 5K), 5000 mAh Magnetic Wireless Portable Charger with USB-C Cable, for iPhone 13 /13 Pro /13 Pro Max /13 Mini /12 /12 Pro /12 Pro Max /12 Mini (Black)


$34.99
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Purchase options and add-ons

Connector Type USB-C*1
Brand Anker
Battery Capacity 5000 Milliamp Hours
Color Black
Special Feature Wireless Charging

About this item

  • The Anker Advantage: Join the 55 million+ powered by our leading technology.
  • Snap and Go: Simple and convenient way to juice up your phone; just attach PowerCore magnetically to the back of your phone for a 5W wireless charge.
  • Made for iPhone 12: Works flawlessly with iPhone 12, iPhone 12 mini, iPhone 12 Pro, and iPhone 12 Pro Max. (Only compatible with MagSafe phone cases)
  • Superior Safety: Anker’s comprehensive MultiProtect safety system includes foreign object detection, short circuit protection, temperature control, and more.
  • What You Get: PowerCore Magnetic 5K, USB-C to USB-C cable, welcome guide, our 18-month warranty, and Anker’s friendly customer service.

Frequently bought together

This item: Anker 521 Magnetic Battery (PowerCore Magnetic 5K), 5000 mAh Magnetic Wireless Portable Charger with USB-C Cable, for iPhone 13 /13 Pro /13 Pro Max /13 Mini /12 /12 Pro /12 Pro Max /12 Mini (Black)
$34.99
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Customer reviews

4.4 out of 5 stars
4.4 out of 5
4,196 global ratings

Customers say

Customers like the quality of the power bank, mentioning it's top tier. They also like the size. However, some customers report issues with the battery life, saying it completely depletes the battery before it'll be fully charged. Opinions are mixed on magnet strength, value, adhesion, performance, and charging.

AI-generated from the text of customer reviews

63 customers mention "Size"63 positive0 negative

Customers like the size of the battery. They say it's small enough to fit in a handbag, and thin enough to put in your pocket. They also appreciate the portability and the slim profile. Some mention that the battery fits well with their iPhone 13 Mini and that it has a snugger fit to the case than when it is caseless.

"...This charger is small and compact which is great because it can fit in any pocket and I love the fact that if I don’t have a charging wire I can..." Read more

"...Something else I like about the battery is how well it fits with my iPhone 13 Mini. It's aligned perfectly as if it were meant for the Mini...." Read more

"...What I like:- USB-C input and output- Small size- Feels sturdy- Reliable..." Read more

"...On it's own, it's not very large which is great...." Read more

52 customers mention "Quality"45 positive7 negative

Customers like the quality of the power bank. They say the magnets are strong, the build quality is good, and the quality is always top tier. Some mention that the first charge was great and lasted a long time. Overall, most are happy with the product's quality and functionality.

"...It’s so easy and great to have around, far better than the old mophie-style battery packs...." Read more

"...What I like:- USB-C input and output- Small size- Feels sturdy- Reliable..." Read more

"Magnets are strong, over all build quality is good typical of Anker and is good for a top off in a pinch.——..." Read more

"...Great for any desktop and bonus 4 USB charging ports. Love the finish and quality. Would recommend friends and family." Read more

222 customers mention "Charging"70 positive152 negative

Customers are mixed about the charging of the power bank. Some mention that it's convenient and great to charge on the go, while others say that it doesn't charge very quickly and that the wireless charging rate isn't fast. Some say that the battery is small and that it will not charge their phone to 100%.

"...The only downside is because of its small battery it will not charge your phone to 100%..." Read more

"...ReliableI love that this small power bank can charge my phone without a cable and it makes it super convenient to take on the go...." Read more

"...The thing about all MagSafe batteries, though, is extremely low charging speeds...." Read more

"...It doesn’t charge as fast as a normal magsafe charger or lighting charger, but it’s enough to top off or sustain your phone’s battery when access to..." Read more

168 customers mention "Performance"113 positive55 negative

Customers are mixed about the performance of the power bank. Some mention it works fantastically, while others say it doesn't work well. The magnet makes it almost unusable at times, and the battery pack is almost dead.

"...(either by plugging it in or by hitting the power button), it has worked great...." Read more

"...It just works and works well. The magnets hold firm when generally holding it with the phone but it will slip if too much pressure is set...." Read more

"...you plan to have the phone laying still on the charger then it doesn’t work well. If I hold my phone then the magnet moves and stops charging...." Read more

"...As to the actual charger, it's been working very well - the form factor is great for the 12 mini and convenient for just putting it in your..." Read more

86 customers mention "Magnet strength"45 positive41 negative

Customers have mixed opinions about the magnet strength of the power bank. Some mention that the magnet is nice and strong, and works well. They say that the magnetic part is cool and nice to not have a cable. Others however, say that it's not as strong, even on a MagSafe case, and that the MagSafe magnet doesn't stay connected as well as they hoped it would.

"...That's up to you.Anker's battery has a more than strong enough magnet that keeps itself locked into place, which would be a huge issue..." Read more

"...My only complaint is that the magnets seem a bit underpowered, because in a pants pocket the battery often becomes detached...." Read more

"...The magnets are strong and the grip is good (passes the scientific shake test)...." Read more

"...I have a Spigen Case on my phone in which the magnet is almost TOO powerful, especially on my popwallet. This charger is much weaker in attraction...." Read more

78 customers mention "Value"35 positive43 negative

Customers are mixed about the value of the power bank. Some mention it's dependable and affordable, worth the investment, and a good lower priced portable wireless charger. Others say it'll under deliver, has poor execution, and is weak.

"...I don't know who's saying the magnet is powerful. THEY ARE WRONG, it sucks. It's the thing I hate the most about it...." Read more

"This battery is priced much more fairly and has a higher capacity than Apple's own MagSafe Battery...." Read more

"It’s a crappy charger if i’m being honest and not worth the price. i used it to charge my phone, doesn’t fully charge it and then it dies...." Read more

"Great battery option for iPhone 12 variations at a very good value. I tend to be someone who gets a battery case for my iPhone...." Read more

56 customers mention "Adhesion"26 positive30 negative

Customers are mixed about the adhesion of the power bank. Some mention that it charges their phone and stays attached decently, while others say that it doesn't stay attached in their pocket as well as they'd like.

"...It slides off very easily. I get that it’s heavy but I would have thought it would have a stronger hold. Charging is slow. But it serves its purpose...." Read more

"...Anker's battery has a more than strong enough magnet that keeps itself locked into place, which would be a huge issue if it didn't...." Read more

"...MagSafe isn’t strong enough to stay well attached, constantly having to realign...." Read more

"...The magnets are strong and the grip is good (passes the scientific shake test)...." Read more

130 customers mention "Battery life"36 positive94 negative

Customers are dissatisfied with the battery life of the power bank. They mention that the charge is completely depleting, and the phone completely drains the battery back before it is completely charged. They also say that the charging didn't last very long, and that the 5000 mA capacity will not give them a full charge. Customers also say the magnets are not strong and that it stopped receiving a new charge yesterday.

"...seem a bit underpowered, because in a pants pocket the battery often becomes detached...." Read more

"...It also heats up noticeably, but not to the point where it is painful or seems dangerous...." Read more

"Great battery option for iPhone 12 variations at a very good value. I tend to be someone who gets a battery case for my iPhone...." Read more

"...However, it takes awhile to recharge the battery. And it drains fairly quickly; but it should be enough to charge your phone one time almost entirely..." Read more

Pretty Good
4 out of 5 stars
Pretty Good
For half of the price you’re getting a MagSafe battery bank that will do the job better than Apple’s MagSafe battery bank especially for anyone who owns a 12 Max. With that said, there are pros and cons when compared to Apple’s.Pros:Faster rechargeIt will give you a better recharge.Battery charge indicator for the battery bank.Cons:The battery bank is thicker due to the larger battery.The magnet is not as strong, even on a MagSafe case.Gets hot while charging the phone.No reverse charging.The battery bank drains just as fast as Apple’s.Nitpick:It doesn’t show up in the battery widget to show you the percentage left.For half the price, it will get the job done. It’ll also charge your 12 Pro Max better. However, you will lose out on some extra features that Apple’s product will give you. Apple’s charger doesn’t get as hot like Anker’s which, in the long run, will be better for your phone’s battery health. I’d recommend it if you don’t want to spend $100 on a battery bank that is less efficient as the pros still outweigh the cons.
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Top reviews from the United States

Reviewed in the United States on March 28, 2022
I have used Anker products for a few years now and I have always been impressed with them. This unit is no different I occasionally drive a company truck for work which doesn’t have usb-c charging and that is one of the main reasons why I chose to get this charger. This charger is small and compact which is great because it can fit in any pocket and I love the fact that if I don’t have a charging wire I can just slap it on the back of my phone which is so convenient! (However make sure you have a MagSafe compatible case if you are using an iPhone) The only downside is because of its small battery it will not charge your phone to 100% (via the MagSafe charging feature I have yet to charge my phone via lighting cable) if your phones battery is lower than 25% but it will give you enough charge to get through your day! All in all I’m very pleased with this charger!
One person found this helpful
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Reviewed in the United States on December 29, 2021
I just recently got an iPhone with MagSafe, and I’ve gotta say this battery and accessories like it are a game changer. I can get about an 80% charge for an iPhone 13 pro from empty. It’s so easy and great to have around, far better than the old mophie-style battery packs. I wish the capacity was a little larger, but it’s pretty good. I got it on sale, but even at full price this or the newer version would be a far better deal than the apple version. My only complaint is that the magnets seem a bit underpowered, because in a pants pocket the battery often becomes detached. Overall not a dealbreaker, definitely great if you can find it on sale!!
Reviewed in the United States on October 17, 2021
This battery is priced much more fairly and has a higher capacity than Apple's own MagSafe Battery. Of course, you won't get the software integration of Apple's battery with Anker, but is the software features worth an extra $50-60, while losing out on battery capacity? That's up to you.

Anker's battery has a more than strong enough magnet that keeps itself locked into place, which would be a huge issue if it didn't. I have an iPhone 13 Mini, and this battery charged my phone from roughly 35%-100% and still had a bit of battery left.

The thing about all MagSafe batteries, though, is extremely low charging speeds. Anker's battery suffers from this as well, I believe topping out at 5 watts. This is also an issue with Apple's version as well, though. I think eventually the manufacturers will figure out how to increase both charging speed and capacity in the future, but in the meantime this is one downside for me as you'll have to keep the battery attached to your phone for hours if you're trying to charge from less than 50% to full.

Something else I like about the battery is how well it fits with my iPhone 13 Mini. It's aligned perfectly as if it were meant for the Mini. This makes the previous issue of charging speeds less of an issue, because using your phone with the battery attached doesn't feel overly cumbersome, in my opinion.

Another nice feature with Anker's MagSafe battery (I believe Apple's version does this as well) is that you can plug the battery into the wall to keep it charged, then place your phone on top of it and use it as a charging pad. I believe you may even get slightly higher charging speeds with this method as well.

If you're trying to decide over this battery or Apple's version, here's an overview:

Get the Anker version if:
- You don't care about software integration
- You prefer a larger capacity
- You don't want to pay the "Apple tax"

Get Apple's version if:
- You do appreciate the software integration
- You only plan to use the battery to top off your phone's battery in a pinch
- You like the all-white design and Apple's simplistic branding
8 people found this helpful
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Reviewed in the United States on July 17, 2022
The media could not be loaded.
 This magnetic battery pack is great for traveling; grocery store trips, going to class, airports, etc. The magnets are strong and the grip is good (passes the scientific shake test). The battery pack will bulk up the phone quite a bit; I don’t really notice it while using the phone with the charger connected, but fitting this into pockets may be an issue. You can just throw the combo in a bag until you need to use it. It doesn’t charge as fast as a normal magsafe charger or lighting charger, but it’s enough to top off or sustain your phone’s battery when access to outlets is limited or when you’re on the go.
6 people found this helpful
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Reviewed in the United States on March 10, 2021
Great battery option for iPhone 12 variations at a very good value. I tend to be someone who gets a battery case for my iPhone. I currently have an iPhone 12 Pro Max. Since Apple hasn't released a battery case yet for my phone, I decided to give this one a try. So far I am quite pleased with it. I like the fact that it charges via usb-c. It also has a very good magnetic hold to the back of my phone. As soon as I understood that the wireless charger had to be activated (either by plugging it in or by hitting the power button), it has worked great. For the most part, I have simply left it attached to my phone since I got it. It supports pass-through charging, so I can just keep it attached and plug in the battery pack. I was happy to find that I could still fit my phone with the battery attached into the same pocket that I normally use for my phone, though your pockets may vary. While a battery case can be sleeker, I do like the convenience of being able to detach this easily whenever I want to. I think the only thing that could improve this is if it was an official Magsafe device and could charge at full Magsafe speed. That said, this has not been an issue at all for me so far, and I have to imagine that would cause a price increase. So far, I am quite pleased with this battery.
23 people found this helpful
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Top reviews from other countries

Ricardo Gómez
5.0 out of 5 stars Buena batería
Reviewed in Mexico on January 23, 2023
Excelente batería portátil. Es una excelente opción para cargar de manera inalámbrica tu iPhone, ya que es Magsafe. Considera varias cosas: al ser inalámbrica la carga no es TAN rápida como con cable. La velocidad de carga es buena-aceptable. Además, tu iPhone se calentará, lo cual es completamente normal por ser carga inalámbrica. Por otro lado, alcanza para una carga completa aproximadamente al iPhone 13 Pro. Es buena compra y la recomiendo ampliamente
Amazon Customer
5.0 out of 5 stars Great
Reviewed in Canada on April 8, 2022
ORIGINAL: It is small, and the magnet aligns well to my iphone, but the charging on it seems very slow. I had it attached for about an hour and went from 62% to 68%. The phone and device also seemed to run really warm, so there seemed to be something off with it. Will use it again a few more times, but if there's no performance improvement, I will be forced to return.

UPDATE: Anker customer service contacted me to follow up on my experience. They were prompt, courteous, and knowledgeable. They stand behind their product and are replacing the defective device. Great customer service!
One person found this helpful
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Cliente de Amazon
5.0 out of 5 stars Excelente opción
Reviewed in Mexico on September 2, 2022
Muy buena batería, la fuerza de MagSafe es buena aun con case en el teléfono.

La recarga es rápida, obvio no tanto como la recarga por cable y cargador.

Se puede usar sin problema para carga alambrica como inalámbrica, probado en iPhone 13 y audífonos pixel (ambas opciones de carga) y Motorola moto g (solo alambrica), de hecho este teléfono la detecta como turbo power.
2 people found this helpful
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Kaylene
5.0 out of 5 stars Great product
Reviewed in Canada on July 16, 2021
The package arrived well protected and on time, even when there was a tornado warning in our area. The battery pack is sleek and small; it is heavier than expected. The construction of the battery pack is solid, like Anker products.

The charging speed is slow; I would look at this product as something that will maintain the phone while connected and not something that will quickly charge the phone.

I like the size, and using my IPhone 12 Pro while the battery is connected is still comfortable.

The magnetic strength with MagSafe cases have been excellent and I am confident it won’t fall off with normal use
Customer image
Kaylene
5.0 out of 5 stars Great product
Reviewed in Canada on July 16, 2021
The package arrived well protected and on time, even when there was a tornado warning in our area. The battery pack is sleek and small; it is heavier than expected. The construction of the battery pack is solid, like Anker products.

The charging speed is slow; I would look at this product as something that will maintain the phone while connected and not something that will quickly charge the phone.

I like the size, and using my IPhone 12 Pro while the battery is connected is still comfortable.

The magnetic strength with MagSafe cases have been excellent and I am confident it won’t fall off with normal use
Images in this review
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3 people found this helpful
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Jazz Chacon
4.0 out of 5 stars Bueno
Reviewed in Mexico on June 25, 2023
Sirve peor carga lento