Anker 621 Magnetic Portable Charger (MagGo), 5,000mAh Wireless Power Bank with USB-C Cable, Magsafe-Compatible Battery Pack for iPhone 16/15/14/13/12 Series
$42.99
Price: $42.99
(as of Mar 24, 2026 19:40:36 UTC – Details)
Product description
1 Backup Power
2 Magnetic Charging
1 Charging Tips
2 Compact Power
3 Compact Power
4 Scratch Protection
Why is my power bank providing fewer charges than expected?
The capacity reduction during charging is due to a 30% to 45% energy loss in the battery cells and conversion circuitry. Therefore, a fully charged Anker A1610 Battery (PowerCore 5K) offers an estimated 2,750mAh~3,250mAh to power devices.
How can I estimate the number of charges for my device?
To estimate charging cycles, use these formula:
(Power Bank Capacity Ć 0.5) Ć· Device Battery Capacity ā Number of Charges.
For instance, charging a 3,000mAh device using a 5,000mAh Wireless power bank would offer approximately 0.83 charges.
Why does charging stop at 80%?
Your iPhone may automatically stop charging at 80% to protect its battery from overheating, as part of iOS 17’s thermal management strategy. Charging will resume once the device cools down. Moving it to a cooler spot can help speed up this process.
Why is my phone overheating?
It’s normal for devices to warm up slightly during wireless charging, particularly with heavy use like extensive gaming or streaming. Rest assured, this device meets international safety standards for safe operation.
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Customer Reviews
4.3 out of 5 stars 18,441
4.4 out of 5 stars 2,156
4.5 out of 5 stars 6,611
4.6 out of 5 stars 3,373
4.6 out of 5 stars 3,614
4.4 out of 5 stars 7,556
4.4 out of 5 stars 10,920
Price
$42.99$42.99
$59.99$59.99
$79.99$79.99
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$89.99$89.99
$59.99$59.99
Series
Basic
Qi2
Qi2
Zolo
Zolo
Premium
High Cell Capacity
Recharging Time
~2 Hours (12Wļ¼
~2 Hours (12Wļ¼
~2 Hours (15Wļ¼
~2.5 Hours (20Wļ¼
~2.5 Hours (20Wļ¼
~ 2.75 Hours (20W)
~ 2.5 Hours (20W)
Size
4.13 x 2.62 x 0.45 in
4.02*2.78*0.34 in
4.09x 2.77x 0.56 inches
4.15 x 2.72 x 0.81
4.07 Ć 2.72 Ć 0.83 in
4.22 x 2.71 x 0.78 in
4.21 x 2.62 x 0.71 in
Weight
129g/0.28lb
4.30 oz
199.8g/7.05oz
8.46 oz (239g)
7.87 oz
250g/8.8oz
218g/7.7oz
Battery Capacity
5,000 mAh
5,000 mAh
10,000 mAh
10,000 mAh
10,000 mAh
10,000 mAh
10,000 mAh
Output Ports
Magnetic, 1xUSB-C
Magnetic, 1xUSB-C
Magnetic, 1xUSB-C
Magnetic, 1xUSB-C
Magnetic, 1xUSB-C
Magnetic, 1xUSB-C
Magnetic, 1xUSB-C
Compatible Devices
iPhone16 /iPhone15/iphone
iPhone16 /iPhone15/iphone
iPhone16 /iPhone15/iphone
iPhone16 /iPhone15/iphone
iPhone16 /iPhone15/iphone
iPhone16 /iPhone15/iphone
iPhone16 /iPhone15/iphone
Smaller Than Ever: Anker’s new MiniCell technology delivers identical charging performance with fewer components. This means it’s smaller and lighter than ever before
Pocket-Sized Power: Slim enough to snap to your phone and slip into your pack, purse, or pocket.
Strong Attachment: Equipped with ultra-strong magnets that firmly attach to the back of the iPhone 15 or 14 so you can single-handedly take selfies, make calls, and more.
Charge in a Snap: Align your iPhone and battery with a snap. Say goodbye to disconnection issues caused by wireless charging misalignment. (Note: Slight heating due to efficiency losses in the conversion circuit is normal.)
What You Get: Anker 621 Magnetic Battery (MagGo), 23.6 in (60 cm) USB-C to USB-C cable, welcome guide, worry-free 24-month warranty, and friendly customer service.
13 reviews for Anker 621 Magnetic Portable Charger (MagGo), 5,000mAh Wireless Power Bank with USB-C Cable, Magsafe-Compatible Battery Pack for iPhone 16/15/14/13/12 Series
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S. Moore –
Compact, Portable, No Wires, Gets Hot!
This was my first Magsafe battery. I had some older Qi wireless chargers and was familiar with heating issues. But these were older and lower power. Without the Magsafe feature, they were finicky and fussy and didn’t properly fit around camera lens protrusions. I barely used these devices.This Anker 621 has a lot of promise. The Magsafe feature locks tight and the dimensions do not interfere with the camera protrusions, even with a case on the phone. It’s compact and slim, and most importantly, does not require wires. It can be easily carried in a backpack or pocket without an accessory bag for wires and cables.When I first unpacked the battery, I fully charged with with a USB-C PD charger. It charged at 1A/5V. I used it to inductively charge my iPhone 14 Pro intermittently over the next few days. After about 10% charge, I determined the heat buildup to be intolerable. Therefore, I only used the pack intermittently. That worked fine for me over several days. When the battery was empty, it took 20Wh to fully charge. The battery was advertised for 5000mAh, which is impossible to measure without disassembling the unit. However, we can calculate 20Wh / 5V / 0.9 = 4400mAh (where 0.9 is the efficiency of the voltage converter for USB). This is below advertised capacity, but thereās a lot of assumptions in the conversion.Then I used a USB-C cable to charge my iPad Mini. It transferred 14.8Wh at about 9 Watts before exhausting. The round-trip efficiency was high, because recharging took 14.8Wh to fully recharge. I suspect I didnāt get the full 20Wh capacity with the iPad because the higher charge demand choked the battery before it could get fully empty.Using the inductive charge mode, both devices get hot relatively quickly. The switching power electronics get particularly hot. I can easily feel where the transistor is located beneath the plastic shell. The inductive transmitter loop gets warm on the battery and the receiver loop gets warm on the phone. Lithium-ion batteries degrade proportionally to temperature (the Arrhenius relationship), accelerating +25% degradation rate for every 10C, this is bad for the phone.In summary,ā¢ The battery delivers 20Wh of energy. If using inductive (Qi and Magsafe), much of the energy is converted to heat, so perhaps only 10-15Wh is actually delivered to the battery.ā¢ If using high-current devices using a charge cable, such as an iPad, the high current chokes the battery a bit early, stopping at 15Wh.ā¢ My back-of-the-envelope calculation shows 4400mAh vs. rated 5000mAh. I suspect the battery is not delivering rated capacity. Anker should be rating these batteries in Joules (watt-hours) instead of Coulombs (ampere-hours).ā¢ Inductive charging is inefficient, losing a quarter to half of energy to heat. This is not Ankerās fault but a result of real-world physics. With my iPhone 14 Pro, I saw about 10C rise per 10% of battery charge. I never let it progress beyond this point.ā¢ Lithium-ion batteries accelerate aging degradation due to the Arrhenius relationship about +25% per 10C temperature rise. Therefore, prolonged use of inductive charging will ultimately age your battery prematurely.ā¢ This battery is very worthwhile because I donāt have to carry an accessory kit with wires to use. Just slap it on the back of the phone and go. Plus, if frees the connector to use with wired headsets when using.
Miggs –
High Temp when using
:UPDATE 3/11/2026 – Anker absolutely honored their commitment to their product and issued me a replacement. They were quick to respond and to mitigate the issue I had with their product. Thank you ANKER!!Iām a huge Anker fan and a loyal consumer of their products, so this is the first time Iāve encountered an issue with one of their products. The charging itself works fine, the problem is that the magnetic charger gets very hot, which disrupts charging until the temperature drops. I have another brand with the same specs that doesnāt have this issue.āāāāāāāāāāāāāāāā
Aathreya G –
Serves its purpose!
Really good product.Delivered without damage and the build quality of Anker is great. Not too bulky! It gets heated a bit when overused, but the magnets are very strong!It always says slow charger while using this! Not even optimal speeds is concerning, but it saves the phone from shutting down.
Amazon Customer –
Great charger but gets hot.
Great product. Gives me one full charge. Does get hot as hell, but that was expected when I bought it. Liked it so much that I bought another for my wife.
Colleen McKinstry –
Forgot your phone cord charger..no problem..
So handy to use if you forget your charging cord..it seems to charge phone quickly..you do have to charge the portable charger between each phnoe charging..for me itās not a big deal..
A. Fountain –
Good Buy
It works great. Only good for one full charge. Like the slim fit.
Madison Martin –
Good for short use but not a long haul charger
The size is perfect for travel as itās not too heavy and is pretty thin. However, charging time isnāt fabulous and I only get one charge. If my phone were to die, I donāt think this would give me a full charge. I bought to take on a cruise as there usually arenāt outlets by the bed. Typically would start charging my phone at 30% and by the time it got to 90% the battery pack would be dead. Will keep for random occasion but not the best option.
TheTryPerson –
Great for prolonged days out
First magnetic portable charger and itās pretty good, never experienced it falling off with standard use so the magnetic strength is really good in my opinion no case needed. Very easy to take around with you, almost like a slim wallet. I have a 15 so it does heat up but I think thatās more due to how much data is on my phone so processing and charging can be a factor.I mainly got it so I donāt have to worry about cords except when Iām charging so thatās a huge plus.My only thought is it does charge but not a significant amount, you wonāt go from 20 to 100 but it definitely keep the phone alive and maybe get to 60-80 just depends
David A. –
Lo comprĆ© para mi mujer y estĆ” muy contenta con la baterĆa externa. Trae suficiente carga para recargar su iPhone una vez (y sobrarle algo).Al ser pequeƱo y con MagSafe, pues cumple con todo.Buena calidad de construcciĆ³n
Vineeth –
Product is light weight and slimmest powerbank in the market.material feels very premium. Magnet has good power to hold the mobile.
Edwinlaw –
Amazing and I love the colour. I can even use it as a wire charger for my AirPods and not worry about it sliding off the patch it has magnets
Amazon Customer –
Great MagSafe charger from Anker
Terrence –
Although its limited to 7.5W of wireless charge, its very convenient for that extra boost to keep going. Sure there’s heat, but that’s basic physics. Anyone looking for a minimalistic EDC needs this. The silicon backing that mates to your phone provides good contact and the magnet is strong. Slim design makes holding your phone and the power bank very comfortable. Even on an S24+, the battery works well. Looking forward to trying out the 10mAh slim wireless power bank.