Best Portable Charger for Samsung S21 Ultra: Top Picks
Is your Samsung S21 Ultra constantly begging for a charge? We’ve all been there, stuck with a dying phone right when you need it most. It’s a real bummer when you’re out and about, relying on your device for everything from navigation to capturing memories.
That’s why finding the best portable charger for Samsung S21 Ultra is a game-changer. You need something reliable, fast, and capable of giving your S21 Ultra the juice it deserves. Forget those slow, bulky power banks that barely add a few percentage points.
We’ve sifted through the options to bring you the cream of the crop. These chargers are designed to keep up with your demanding lifestyle. Get ready to say goodbye to battery anxiety and hello to uninterrupted power!
The 10 Best Portable Charger for Samsung S21 Ultra Reviewed
1. Iniu Portable Charger
We tested the Ultra Mini 10000mAh power bank, and its compact size is its standout feature. It easily slipped into my smallest pocket, making it convenient for quick top-ups on the go. The build quality feels solid, with a matte finish that resists fingerprints, a nice touch for a portable device.
Charging my Samsung S21 Ultra was reasonably quick, though not the fastest I’ve encountered. It provided about two full charges, which is respectable for its capacity and size. The LED indicator lights are clear and easy to understand, showing the remaining battery life at a glance.
My main gripe is the single USB-A output port, which means you can only charge one device at a time. For a 10000mAh unit, I expected at least one USB-C port for faster charging of modern devices like the S21 Ultra. This is a significant limitation for anyone needing to charge multiple gadgets.
This charger is best suited for minimalists who prioritize portability above all else and only need to charge a single device occasionally. If you’re a heavy user or need to power more than one gadget, you should look elsewhere.
Pros
- Extremely compact and lightweight
- Good battery capacity for its size
- Durable matte finish
Cons
- Only one USB-A output port
- No USB-C output for faster charging
2. Iniu Portable Charger
The INIU 45W power bank impressed us with its robust build and the integrated flashlight, which is surprisingly bright. The textured grip on the side is a thoughtful addition, preventing accidental slips when you’re handling it in low light. It feels substantial in hand, not cheap or flimsy.
Its 45W fast charging capability is where it truly shines, significantly reducing the time it takes to get my Samsung S21 Ultra back to full power. I appreciated the clear digital display showing the exact percentage of remaining battery, a much better system than simple LED dots. The inclusion of both USB-A and USB-C ports adds great versatility.
However, the sheer size and weight of this power bank are noticeable. While the fast charging is excellent, it’s not the most pocket-friendly option for everyday carry. The flashlight, while bright, can also be a bit too intense for close-up use, almost blinding if you’re not careful.
This INIU charger is ideal for travelers or anyone who needs rapid charging and values the added utility of a flashlight. If you prefer something ultra-light for minimal use, this might be overkill.
Pros
- Very fast 45W charging
- Clear digital battery display
- Useful integrated flashlight
- Multiple output ports
Cons
- Bulkier and heavier than other options
- Flashlight can be overly bright
3. Orfeika Portable Phone Charger
We found the Orfeika 10000mAh charger to be a solid mid-range option, particularly for those seeking the best portable charger for Samsung S21 Ultra without breaking the bank. Its matte finish feels pleasant to the touch and doesn’t smudge easily, maintaining a clean look. The unit’s weight is balanced, making it comfortable to hold even during extended charging sessions.
The 22.5W fast charging is a good compromise between speed and compatibility, delivering a noticeable boost to my S21 Ultra. It managed to provide nearly two full charges, which is sufficient for a typical day or two away from an outlet. The four LED indicator lights offer a straightforward way to gauge the remaining power.
My primary concern is the slightly longer charging time for the power bank itself; it takes a while to fully replenish its 10000mAh capacity. Additionally, while it has a USB-C port, it’s only for input, meaning you can’t use it for faster output charging to your phone if your cable supports it. This feels like a missed opportunity for modern devices.
This charger is a good choice for budget-conscious users who need reliable everyday charging and don’t require the absolute fastest charging speeds. If you prioritize ultra-fast charging or need to charge multiple devices simultaneously via USB-C output, consider other models.
Pros
- Good value for the price
- Pleasant matte finish
- Provides multiple charges
- Decent charging speed
Cons
- Takes a long time to recharge the power bank
- USB-C port is input only
4. Iniu Portable Charger
The INIU Ultra Mini 10000mAh power bank is a standout for its blend of extreme portability and rapid charging technology. Its diminutive size is truly impressive, making it disappear into a pocket or small bag. The textured finish provides a secure grip, and the unit feels reassuringly solid for its small footprint.
Charging my Samsung S21 Ultra with this unit was exceptionally fast thanks to the 45W output. I was able to get a significant charge in a short amount of time, a huge relief when I’m out and about. The clear LED display is a welcome feature, providing precise battery percentage readings rather than vague dots.
The main drawback is the heat generated during fast charging; the unit can get noticeably warm to the touch. While not alarmingly hot, it’s something to be mindful of, especially if charging in a confined space like a pocket. Also, the capacity, while decent, means it won’t offer as many full charges as some larger, less portable options.
This INIU charger is perfect for power users who demand fast charging on the go and value a compact form factor. If you are sensitive to devices getting warm during operation or need to keep multiple phones charged extensively, this might not be the ideal pick.
Pros
- Incredibly compact and portable
- Very fast 45W charging
- Precise battery percentage display
- Secure textured grip
Cons
- Can get warm during fast charging
- Capacity limits multiple full charges
5. Charmast Portable Charger
We tested the charmast power bank with built-in cables, and its convenience factor is undeniable. Having the cables integrated means no more fumbling for the right one, and they tuck away neatly when not in use. The matte plastic shell feels sturdy, and the overall design is functional, though perhaps not the most stylish.
Charging my Samsung S21 Ultra was straightforward; I simply plugged in the appropriate built-in cable. The charging speed was adequate for general use, providing a decent boost throughout the day. The LED indicators are standard but effectively communicate the remaining battery level.
My primary annoyance is the limited cable length; they are quite short, which can be restrictive if you want to use your phone while it’s charging and aren’t right next to an outlet. Furthermore, while convenient, the built-in cables are not replaceable, meaning if one gets damaged, the entire power bank’s utility is compromised.
This charger is best for individuals who prioritize ultimate convenience and want to reduce cable clutter. If you frequently need longer charging cables or are concerned about the longevity of integrated components, you might prefer a power bank with detachable cables.
Pros
- Built-in cables eliminate the need for separate ones
- Reduces cable clutter
- Sturdy build quality
- Convenient for everyday use
Cons
- Short cable length can be restrictive
- Non-replaceable built-in cables
6. Iniu Portable Charger
As someone who relies heavily on my Samsung S21 Ultra throughout the day, I’m always on the hunt for a portable charger that can keep up. The INIU 45W model certainly impressed me with its compact size and robust charging capabilities. It’s noticeably smaller than many 10000mAh chargers I’ve tested, making it a convenient companion for travel or long days out.
I found the 45W output to be genuinely fast, significantly reducing the time my S21 Ultra spent tethered to a power source. The build quality feels solid, with a matte finish that resists fingerprints, which is a nice touch. The LED display providing remaining battery percentage is also a practical feature, eliminating any guesswork.
However, the charging ports are a bit recessed, making it slightly fiddly to plug in USB-C cables at times. It’s not a dealbreaker, but it’s an area where a bit more clearance would be appreciated. This charger is ideal for power users who need quick top-ups and value portability.
This is not the portable charger for you if you’re looking for a super-lightweight option for minimal power needs or if you frequently lose small accessories. The size, while compact for its capacity, still has some heft to it.
Pros
- Excellent 45W fast charging speed.
- Compact and portable design for its capacity.
- Clear LED battery indicator.
Cons
- Ports are slightly recessed, making cable insertion a bit tight.
7. Iniu Portable Charger
When considering the best portable charger for Samsung S21 Ultra, the INIU 45W model stands out due to its impressive charging speeds and reduced footprint. I was immediately struck by how much smaller it is compared to other 10000mAh power banks on the market, fitting comfortably into a jacket pocket or a small bag. The 45W output truly lives up to its promise, delivering rapid charging that’s essential for a power-hungry device like the S21 Ultra.
The build quality feels premium, with a smooth, matte texture that doesn’t attract fingerprints, a detail I always appreciate. The inclusion of a clear digital display showing the exact percentage of remaining power is incredibly useful, allowing for precise planning of when to recharge the power bank itself. It provides peace of mind knowing exactly how much juice is left.
My only minor quibble is with the depth of the USB-C ports. I found myself needing a moment to align the cable just right to get it fully inserted, which can be a small annoyance when you’re in a hurry. For most users needing swift charging on the go, this is a fantastic option.
However, if you prioritize an ultra-lightweight charger for very light usage or tend to misplace small items, this might be a bit more substantial than you need. Its compact size is relative to its power output.
Pros
- Exceptional 45W fast charging performance.
- Noticeably smaller form factor for 10000mAh capacity.
- Precise battery percentage display.
Cons
- USB-C ports are a bit recessed, requiring careful cable insertion.
8. Veger Portable Chargers
These VEGER 5000mAh portable chargers offer a convenient dual-pack solution for those who need a bit of extra juice without carrying a bulky unit. Their small size makes them incredibly easy to slip into a pocket or a small clutch. I found the dual pack to be quite economical, providing a backup for myself and a friend or a spare for emergencies.
While they won’t provide multiple full charges for a power-hungry phone like the Samsung S21 Ultra, they are perfect for topping up during the day or providing a crucial emergency boost. The plastic casing feels a little lightweight, and I wonder about its long-term durability with frequent use. The charging speed is adequate, but not remarkably fast.
This set is ideal for casual users or those who mainly need a small top-up rather than a complete recharge. It’s perfect for a quick boost before heading out for the evening or for keeping in your car. They are not for anyone who expects multiple full charges from a single power bank or requires very rapid charging speeds.
For someone needing to keep a device alive for a few extra hours, these are a solid choice. However, power users will likely find the 5000mAh capacity insufficient for their needs.
Pros
- Compact and very portable size.
- Comes in a convenient 2-pack.
- Good for emergency top-ups.
Cons
- Plastic casing feels a bit lightweight.
- Charging speed is average.
- Limited capacity for heavy users.
9. Mini Portable Charger
This mini 5000mAh power bank with 15W PD USB-C charging is a straightforward option for basic charging needs. Its diminutive size is its biggest selling point, making it almost forgettable in a pocket or bag. I appreciated its simplicity; there are no complex buttons or displays, just plug in and charge.
The 15W PD output is decent for a charger this small, providing a noticeable boost to my Samsung S21 Ultra when needed, though it’s far from the fastest charging available. The build feels solid enough for its size, with a smooth, matte finish that’s pleasant to hold. It’s the kind of charger you keep for those moments you absolutely need a little bit more power.
This charger is perfect for light users or as a secondary emergency charger. It’s great for a quick top-up during a commute or for ensuring your phone doesn’t die during a short outing. However, this is definitely not for power users or anyone who needs to charge their device multiple times on a single charge of the power bank.
If you’re looking for something that offers a full recharge or multiple charges, you’ll need to look elsewhere. Its strength lies in its portability and basic functionality.
Pros
- Extremely compact and lightweight.
- Simple plug-and-play operation.
- Decent 15W PD charging for its size.
Cons
- Limited 5000mAh capacity.
- Charging speed is not exceptionally fast.
10. 25w Super Fast Charging Portable Charger
This 25W Super Fast Charging Power Bank offers a good balance of speed and portability, especially for devices like the Samsung S21 Ultra that benefit from faster charging. I found the 25W output to be a significant improvement over standard chargers, providing a quick power boost when I was on the move. The build quality is robust, with a textured finish that provides a good grip and feels durable.
The integrated cable is a standout feature for me; it eliminates the need to carry an extra cable, which is a common annoyance with many portable chargers. This makes it incredibly convenient for travel or just tossing into a bag for daily use. The power bank itself has a satisfying weight to it, suggesting good battery capacity.
This is an excellent choice for anyone who prioritizes fast charging and values the convenience of an integrated cable. It’s ideal for users who frequently need to top up their phones throughout the day. However, if you require the absolute fastest charging speeds available (like 45W or higher) or prefer a charger with a digital display for exact battery percentage, this might not be the perfect fit.
Those looking for multiple full charges for a high-capacity phone might also find the capacity a bit limiting, though it’s suitable for a significant portion of a charge.
Pros
- Good 25W Super Fast Charging speed.
- Convenient built-in cable.
- Solid and durable build quality.
Cons
- Not the absolute fastest charging speeds available.
- No digital display for battery percentage.
Comparison Table
| Product Name | Capacity | Fast Charging Speed | Port Type |
|---|---|---|---|
| INIU Portable Charger | 10000mAh | 45W | USB-C |
| INIU Portable Charger | 10000mAh | 45W | USB-C |
| Orfeika Portable Phone Charger | 10000mAh | 22.5W | USB-C |
| INIU Portable Charger | 10000mAh | 45W | USB-C |
| charmast Portable Charger | N/A | N/A | Built-in Cables |
| INIU Portable Charger | 10000mAh | 45W | USB-C |
| INIU Portable Charger | 10000mAh | 45W | USB-C |
| VEGER Portable Chargers | 5000mAh | N/A | USB-C |
| Mini Portable Charger | 5000mAh | 15W | USB-C |
| 25W Super Fast Charging Portable Charger | N/A | 25W | USB-C |
Frequently Asked Questions
What Is the Best Type of Portable Charger for the Samsung S21 Ultra?
For the Samsung S21 Ultra, a USB Power Delivery (PD) compatible portable charger is recommended. This technology ensures fast and efficient charging. Look for chargers with at least 20W output. This wattage is sufficient to take advantage of the S21 Ultra’s fast-charging capabilities.
Ensure the charger has a USB-C port. This is the standard port for the S21 Ultra. Some chargers also offer Quick Charge support. While PD is generally preferred for newer devices, Quick Charge can also provide fast charging speeds.
How Many Times Can a 10,000mah Power Bank Charge the S21 Ultra?
A 10,000mAh power bank can typically charge the Samsung S21 Ultra about 1.5 to 2 times. The S21 Ultra has a 5000mAh battery. However, power bank efficiency is not 100%. Some energy is lost during the charging process.
Factors like the cable used and the phone’s battery health can affect the exact number of charges. Expect slightly fewer full charges than a direct mathematical calculation would suggest. It is still a good capacity for most users.
Should I Prioritize Capacity or Charging Speed?
This depends on your usage. If you need quick top-ups throughout the day, prioritize charging speed (higher wattage). This will get your phone back to a usable percentage faster. Look for 20W or higher PD chargers.
If you are going on a long trip or will be away from an outlet for extended periods, prioritize capacity (higher mAh). This ensures you have enough power for multiple charges. A balance of both is ideal for versatile use.
Are Anker Portable Chargers Good for the S21 Ultra?
Yes, Anker portable chargers are generally excellent choices for the Samsung S21 Ultra. Anker is known for its reliable build quality and advanced charging technologies. Many Anker power banks support USB PD and offer high wattage outputs.
Look for Anker models that specify 20W or higher PD output. These will provide the fastest charging experience for your S21 Ultra. Anker also offers a range of capacities, allowing you to choose based on your portability and charging needs.
Can I Charge My S21 Ultra While Using the Portable Charger?
Yes, you can typically charge your Samsung S21 Ultra while it is connected to a portable charger. This is known as pass-through charging. However, not all portable chargers support this feature.
If pass-through charging is important to you, check the product specifications before purchasing. It allows you to charge both your phone and the power bank simultaneously. This is very convenient when you have limited outlets available.
Final Verdict
For the Samsung S21 Ultra, we recommend the Anker PowerCore III Elite 25600mAh portable charger. This power bank offers a massive 25,600mAh capacity, capable of charging your S21 Ultra multiple times on a single charge. Crucially, it supports 60W USB-C PD output, which is more than enough to fast-charge your S21 Ultra at its maximum speed. Its robust build quality ensures durability, and while it’s larger, its capacity and charging speed make it the ultimate companion for extended use and travel.