Price: $29.99
(as of Jul 23, 2025 01:02:06 UTC – Details)
Product Description
Upgraded Protection with ActiveShield
ActiveShield safety system offers enhanced protection with a dynamic temperature sensor that actively monitors temperatures over a million times a day.
Purchase Tip
We offer two versions of this product: one with a Lightning connector and another with a USB-C connector. If you’re using an iPhone 15 or 16, and purchased the Lightning version, no worries—just connect your device using a separate USB-C to USB-C cable from the power bank’s USB-C port.
Anker 621 Power Bank (Built-In Lightning Connector, 12W) Unfold. Charge. Go Further.
Compact Design, Big Power
In addition to its compact and scratch-free portable design, the power bank also features a built-in Lightning connector that can be folded away when not in use.
Made for Your Apple Devices
You can trust the power bank to work safely and effectively with your Apple devices, thanks to its MFi certification.
Charge with Confidence
ActiveShield safety system features advanced temperature monitoring and power output control to help protect your device while it’s fast charging.
Note1. Use the Lightning port to charge an iPhone and the USB-C port to recharge the power bank, please note that simultaneous charging and recharging are not supported.
Note2. To ensure a stable connection, we recommend holding your phone while charging as the Lightning port is foldable.
Note3. Not compatible with phone cases thicker than 0.19 in (4.9 mm), such as OtterBox defender cases.
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 Nano Power Bank offers an estimated 2,750mAh to 3,500mAh to power devices.
How can I estimate the number of charges for my device?
To estimate charging cycles, use this formula:
(Power Bank Capacity × 0.65) ÷ Device Battery Capacity ≈ Number of Charges.
For instance, charging a 3,000mAh device using a 5,000mAh power bank would offer approximately 1.08 charges.
How can I make the charging connection more stable?
Since the Lightning connector is foldable, it’s best to charge in a stable position to maintain a secure connection. For example, hold the phone in your hand while charging rather than placing it in cluttered environments such as a bag.
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Customer Reviews
4.0 out of 5 stars 9,320
4.2 out of 5 stars 10,267
4.6 out of 5 stars 864
4.6 out of 5 stars 2,085
4.5 out of 5 stars 1,731
4.6 out of 5 stars 2,329
4.6 out of 5 stars 7,053
Price
$29.99$29.99
$19.99$19.99
$59.99$59.99
$49.99$49.99
$42.99$42.99
$44.99$44.99
$49.99$49.99
Series
Portable
Portable
Portable
Basic
Basic
Basic
Portable
Main Feature
Built-in
Built-in
10K 35W For Apple Watch
Wireless
Wireless
3-in-1 Charger + Built-In 30W
Built-in
Output Ports
Bulit-in Lightning*1
USB-C*2
USB-C + USB-C Cable
USB-C * 1
USB-C *2
Built-in C Cable + 1C
1C1A + Built-In USB-C Cable
Recharging Time
~2 Hours
～2.4 Hours
~2.5 Hours
~3 Hours
~3 Hours
~3.5 Hours
~ 1.65 Hours
Size
3.03 x 1.45 x 0.98 in
3.03 x 1.45 x 0.98 in
3.74 × 2.01 × 1.28 in
4.07 × 2.72 × 0.83 in
4.15 × 2.72 × 0.81 in
4.25*1.97*1.22 in
4.13 × 2.06 × 1.02 in
Weight
3.47oz
3.47oz
8.64 oz
7.87 oz
8.46 oz
8.8oz
8.3 oz
Pocket-Sized Power: Equipped with a built-in Lightning connector, making it easy to charge your Apple devices without having to carry an extra cable.
12W Fast Charging: Power your device quickly and efficiently with the 12W output, so you’ll be up and running in no time.
MFi Certified: The power bank is made specifically for Apple devices like iPhones, iPads, and iPods—trust it to work safely and effectively with your devices.
The Ultimate Power Boost: Get up to 20 hours of additional video playtime for your iPhone 14 Pro Max with a 5,000mAh capacity—enough to keep you entertained for an entire journey.
What You Get: Anker 621 Power Bank (Built-In Lightning Connector, 12W), 1.9 ft (60 cm) USB-C to USB-C cable, welcome guide, worry-free 18-month warranty, and our friendly customer service.
Reviewer: Irakli T.
Rating: 5.0 out of 5 stars
Title: The Perfect Gift for My Wife
Review: I recently surprised my wife with the Anker Nano Portable Charger for her iPhone, and it has been nothing short of a game-changer for her daily routine. Here’s why this tiny powerhouse has impressed us both and why I think it’s an excellent gift for anyone in need of a reliable charging solution.Design and Portability: The Anker Nano’s compact size was the first thing that caught our attention. It’s incredibly small and lightweight, making it easy for my wife to carry it in her purse or even her pocket. Despite its size, it feels durable and well-crafted, a testament to Anker’s quality.Charging Speed: This charger has exceeded our expectations in terms of performance. It charges her iPhone remarkably fast, rivaling the speed of the much larger charger that originally came with her phone. It’s been a relief knowing she can quickly charge her phone whenever needed, especially during busy days.Compatibility: We’ve been pleased with how well the Anker Nano works with her iPhone, and I’ve even borrowed it for my own device with no issues. Its broad compatibility ensures that it’s a versatile charger, suitable for various models, which adds to its value as a gift.Convenience: The convenience of the Anker Nano cannot be overstated. Its small size means it’s never a burden to carry around, and it’s become a staple in my wife’s daily essentials. She appreciates the freedom it gives her, allowing her to use her phone as much as she likes without worrying about battery life.Overall Experience: Giving the Anker Nano Portable Charger as a gift to my wife turned out to be a fantastic decision. It’s reliable, efficient, and incredibly user-friendly. She’s been using it daily and continues to rave about how much she loves it. The charger’s quality and performance have made her day-to-day life easier, and it’s reassuring to know she’s always just a quick charge away from a full battery.In summary, the Anker Nano Portable Charger is an excellent choice for anyone looking for a small, yet powerful iPhone charger. Its performance, combined with its sleek design and compatibility, makes it a thoughtful and practical gift. My wife’s positive experience with it is a testament to its value, and I wouldn’t hesitate to recommend it to others looking for a reliable portable charging solution.
Reviewer: Amazon Seaside Shopper
Rating: 5.0 out of 5 stars
Title: Compact, reliable, and perfect for travel
Review: This is the second one I’ve purchased, and I love it just as much as the first! It’s small, lightweight, and super easy to carry—perfect for keeping in a purse, pocket, or travel bag.It gives my phone about a 40–50% charge, which is exactly what I need when I’m on the go. Reliable, convenient, and a total must-have for traveling or busy days out. Highly recommend!
Reviewer: Manuel Abadie
Rating: 3.0 out of 5 stars
Title: Great functionality but Questionable Durability
Review: I have always stood by Anker. Have two other power banks that throughout the last 4 years saved my butt while out camping. Naturally, I bought this one for my girlfriend who bc of work often runs out of battery and does not have access to a power outlet. She loved the size and color and having the extra battery available. Functionality is top tier as when plugged into the phone you can barely feel the weight and size and will fully charge her phone. However, after 5 months, it just stopped working. Just like other reviews mentioned it. It is fully charged but does not charge a phone anymore. I suspect it must be related to the charging port having to rotate to operate instead of being fixed. Anyways, I would’ve given it 5 stars if it wasn’t because the Durability was definitely not up to par. Hopefully, it is just a product problem and not a brand quality problem.
Reviewer: Mahesh Vandanam
Rating: 4.0 out of 5 stars
Title: Awesome and handy power bank only till it goes dead.
Review: Bought 3 of these as Christmas gifts and one of them is dead already. They worked great and my wife and kids loved how small they were and so easy to carry them around and charge their phones instantaneously.This week, one of them went dead. Doesn’t charge, doesn’t light up. Its just a paper weight. I tried to contact Anker warranty support and filed a claim online. They were very fast in responding back to my claim submission but stalling and dragging the process out asking me for the same information again and again even after submitting everything( pictures, Proof of purchase, details of troubleshooting and what not). I am currently on my 4th email response back to them and curious to see where this goes. I have used several Anker products and always been satisfied with their quality. For such a small price tag item, I wish Anker just sends a new item without all this hassle of going back and forth. It probably costs them a buck to make it in china and are selling it 20x more. Lets see how this warranty claim goes. In the meantime, I already ordered a new one for my son. Hopefully if they replace the broken one, we can use it as a spare charger.
Reviewer: Jean Gray
Rating: 5.0 out of 5 stars
Title: Going round 2
Review: Edit: Customer Service quickly addressed the dud issue and sent me a new one. Let’s see how long this one lasts. I really love the compact size and that I don’t have to have a cable with me.First off, for years I have loved Anker products. I have many portable batteries that have worked great. I should have been leery of this one with a built in charging port and after about 6 months of very sporadic use, maybe 12 times total over that time frame it no longer recognizes it’s been plugged into a phone. I’ve tried 4 iPhones, with cases off and none of them cause it to charge. I even tried pushing the power button and that didn’t do anything. And yes, the prongs were cleaned and seem free from damage and I tried flipping it both ways.I’m hoping I got a dud and Anker customer service will help out since this is within the 18month warranty window. I like the size of this and that you don’t have to have a separate cable and that it was compatible with all the phone cases we have. But sadly the USB-C port is input only so once the folding port dies, the battery pack is useless. The port seems really sturdy so there shouldn’t have been a way for it to pull a wire out. The only other downside is that you can’t really stick your phone in your pocket with this battery pack attached unlike ones that you can put behind the phone rather than under.
Reviewer: aldaghriri2001
Rating: 5.0 out of 5 stars
Title:
Review: اكثر من ممتاز رائع جدا
Reviewer: Maria
Rating: 5.0 out of 5 stars
Title:
Review: Habe eine Powerbank gesucht die Handlich ist und auch in die Handtasche passt, für unterwegs. Und diese von Anker ist wirklich perfekt für unterwegs, sieht schick aus und ist klein. Ist schnell aufgeladen und lädt bei mir wenn ich 1% Akku habe ca bist 70% auf ( bei iPhone 11). Ein extra Kabel zum aufladen der Powerbank ist auch dabei. ☺️
Reviewer: A&F
Rating: 5.0 out of 5 stars
Title:
Review: سهل
Reviewer: Edwin Pérez
Rating: 5.0 out of 5 stars
Title:
Review: Para llevar en mochila y para una emergencia, es buenisima, no esperes que cargue tu iPhone más de 1 vez, pero de que te lleva del 0 al 60 % en menos de una hora si. Te salva para llegar a casa y poderlo cargar. Practico y no calienta mucho el celular.
Reviewer: Jane
Rating: 5.0 out of 5 stars
Title:
Review: Very handy portable charger, small size and decent battery life
