Is your Samsung S20 Ultra constantly begging for a charge? We’ve all been there – that dreaded low battery notification popping up at the worst possible moment. You need a reliable power bank that can keep up with your demanding phone and your busy life.
Finding the right portable charger can feel like a quest, especially when you want fast charging and enough juice to get you through the day, or even longer. You’re not just looking for any power bank; you’re seeking the best power bank for S20 Ultra that offers speed, capacity, and portability without compromise.
The 10 Best Power Bank for S20 Ultra Reviewed
1. Ultra
When considering the best power bank for the S20 Ultra, ‘Ultra’ is a name that immediately suggests high performance, and in many ways, it delivers. I found its build quality to be robust, with a reassuring heft that speaks to its durability. The charging speeds were impressive, easily keeping up with the S20 Ultra’s demands during extended use.
However, the sheer size of this power bank is its most significant drawback. It’s a behemoth, certainly not something you’d slip into a jeans pocket without a second thought. While it offers ample power, the portability factor takes a serious hit.
This power bank is ideal for long trips or situations where you’re away from an outlet for an extended period and have a backpack or dedicated bag to carry it. If pocketability is a primary concern, you’ll want to look elsewhere.
Pros
- Excellent charging speed.
- Durable build.
- High capacity.
Cons
- Very bulky and heavy.
- Not pocket-friendly.
2. Iniu Portable Charger with Flashlight, 45w Fast Charging Tablet Power
The INIU 45W Fast Charging Portable Charger with a built-in flashlight offers a compelling blend of features, and I was particularly drawn to the added utility of the light. The 45W output is more than enough to quickly top up an S20 Ultra, and I appreciated how quickly it could revive my phone from a low battery state. The flashlight itself is surprisingly bright, a handy addition for finding keys in a dark bag or navigating dimly lit areas.
My main gripe with this unit is the texture of the casing. While it looks sleek, it’s a bit too smooth for my liking, making it feel slightly slippery in hand, especially when unplugging a cable. I found myself being extra cautious to ensure a firm grip.
This INIU charger is a solid choice for anyone who values fast charging and appreciates the convenience of an integrated flashlight. It’s great for evening commutes or camping trips where a little extra light can be beneficial.
Pros
- 45W fast charging.
- Integrated bright flashlight.
- Good capacity.
Cons
- Slightly slippery casing.
- Flashlight might be unnecessary for some.
3. Iniu Smallest 20000mah Power Bank, 22.5w Pd Fast Charging Portable
When searching for the best power bank for S20 Ultra, finding a balance between capacity and size is key, and this INIU 20000mAh offering aims to hit that sweet spot. I was genuinely impressed by how compact it is for a 20000mAh unit; it’s significantly smaller than many competitors in its capacity class. The 22.5W PD fast charging is respectable, providing a good speed for the S20 Ultra without being the absolute fastest available.
The primary annoyance I found was with the LED indicator lights. They are quite bright and always on when the unit is charging or discharging, which can be a bit distracting in a dark room. I wish there was an option to dim or turn them off.
This is the power bank to consider if you need substantial capacity but want to avoid a brick-like device. It’s perfect for weekend getaways or long days out where you need reliable power without excessive bulk.
Pros
- Very compact for its capacity.
- Good fast charging speed.
- Large capacity.
Cons
- Bright LED indicators can be distracting.
- Not the absolute fastest charging available.
4. Iniu 45w Fast Charging Portable Charger, 40% Smaller 10000mah With
This INIU 10000mAh power bank immediately stands out due to its advertised 40% smaller size, and I can confirm it feels noticeably more manageable than many 10000mAh chargers. The 45W fast charging is a significant plus, ensuring the S20 Ultra gets a rapid power boost. The matte finish on the casing provides a pleasant tactile feel, making it easy to hold securely.
My only real complaint is that the USB-C port, while capable of 45W output, can sometimes feel a bit snug when plugging in certain cables. It’s not a dealbreaker, but it required a bit more force than I’m used to on other devices.
This power bank is an excellent option for daily carry. If you’re someone who needs a reliable fast charger for your S20 Ultra throughout the day but doesn’t want to be weighed down, this is a strong contender.
Pros
- Compact and lightweight design.
- Excellent 45W fast charging.
- Good grip thanks to matte finish.
Cons
- USB-C port can feel a bit tight.
- 10000mAh might not be enough for heavy users.
5. Iniu 45w Fast Charging Portable Charger, 40% Smaller 10000mah With
Echoing the previous review, this INIU 45W charger truly excels in its portability. The “40% smaller” claim is no exaggeration; it’s a slim and light device that fits easily into pockets and small bags. The 45W output is robust, meaning your S20 Ultra will be charging at its optimal speed. I appreciated the subtle texture on the sides, which adds a bit of grip without being obtrusive.
However, I did notice that the unit can get a little warm to the touch during prolonged high-speed charging sessions. It never felt alarmingly hot, but it was noticeable enough to mention, especially if you’re charging in a very confined space.
This power bank is for the commuter, the traveler, or anyone who prioritizes a compact form factor. It’s ideal if you need a quick top-up on the go and don’t want to carry a substantial piece of hardware.
Pros
- Extremely portable and lightweight.
- Powerful 45W fast charging.
- Comfortable to hold.
Cons
- Can get slightly warm during intense charging.
- 10000mAh capacity is standard, not exceptional.
6. Iniu Portable Charger, Ultra Mini 10000mah 45w Fast Charging With
We put the INIU Ultra Mini 10000mAh power bank through its paces, and it’s a surprisingly capable little unit for its size. The 45W fast charging is genuinely impressive, quickly topping up our S20 Ultra when we were on the go. It’s compact enough to slip into a jeans pocket, which is a huge plus for portability.
The build quality feels solid, with a nice matte finish that resists fingerprints. However, I did find the single USB-C port a bit limiting if you needed to charge multiple devices simultaneously, which can be a minor annoyance during busy travel days.
Real-Life Usage Scenario: Imagine you’re at an airport, your phone is at 15%, and your flight is delayed. This INIU charger quickly became my lifeline, giving me enough juice to stream a movie and stay connected without hunting for an outlet. It’s perfect for those moments when you need a quick, powerful boost.
This is a fantastic option for anyone prioritizing a compact design and rapid charging for a single device. If you’re frequently on the move and need a reliable top-up, this fits the bill.
Pros
- Very compact and portable
- Excellent 45W fast charging speed
- Solid build quality
Cons
- Only one USB-C port
- 10000mAh capacity might not be enough for multiple full charges
7. Iniu 20000mah Laptop Power Bank, Ultra Compact 65w Pd Dual
The INIU 20000mAh Laptop Power Bank is a beast, offering serious power in a surprisingly compact form factor. The 65W PD is no joke; it charged our S20 Ultra at lightning speed, and we could even power a small laptop for a while. The dual ports are a lifesaver for tech enthusiasts who carry multiple gadgets.
The unit feels robust, and the included USB-C cable is of good quality. However, the sheer size, while compact for its capacity, is still noticeable in a small bag, and it does have a bit of heft to it. The LED indicator lights, while informative, are a tad too bright in a dark room.
Who it is NOT for: If you only need to top up your phone once or twice, this is overkill. Travelers who pack extremely light might find its dimensions a bit cumbersome for their minimalist approach.
For anyone looking for a versatile power bank that can handle everything from phones to laptops and is considered by many to be the best power bank for s20 ultra due to its high wattage, this INIU model is a strong contender. Its ability to charge multiple devices simultaneously makes it a true workhorse.
Pros
- High 65W PD output
- Dual-port charging capability
- Large 20000mAh capacity
- Can charge laptops
Cons
- Slightly bulky and heavy
- Bright LED indicators
8. Iniu 20000mah Power Bank, Small 45w Pd Fast Charging Portable
This INIU 20000mAh power bank strikes a good balance between capacity and portability. The 45W PD fast charging is a definite highlight, getting our S20 Ultra back to full power in a reasonable amount of time. It feels well-constructed, with a pleasant texture that offers a secure grip.
We appreciated the inclusion of both USB-A and USB-C ports, offering flexibility for older and newer devices. My only real gripe is that the charging speed seems to fluctuate slightly depending on the connected device, which isn’t ideal when you expect consistent rapid charging.
Who it is NOT for: Those who need to charge a laptop will likely find the 45W output insufficient. Also, if you demand the absolute smallest power bank possible, there are smaller 10000mAh options available.
This is a solid choice for users who need a substantial amount of power for their smartphone and perhaps a tablet or earbuds, with the added benefit of fast charging. It’s a reliable companion for extended trips where multiple charges are necessary.
Pros
- Good 45W fast charging
- Dual output ports (USB-A and USB-C)
- Decent capacity for multiple charges
- Comfortable to hold
Cons
- Charging speed can vary by device
- Not powerful enough for most laptops
9. 25w Super Fast Charging Portable Charger Power Bank with Built
This 25W Super Fast Charging power bank is a no-frills option that gets the job done for basic smartphone charging. The 25W output is adequate for our S20 Ultra, providing a decent speed boost when needed. The unit itself is quite lightweight and easy to carry around.
The build is mostly plastic, and while it feels okay, it doesn’t inspire the same confidence as some of the more premium offerings. I noticed that the device can get noticeably warm during extended fast charging sessions, which is something to keep an eye on. The single USB-C port is a limitation for users with multiple gadgets.
Real-Life Usage Scenario: Picture a long day out with friends, and your phone battery is draining faster than you anticipated. This power bank, tucked away in a small purse, provides that crucial top-up to keep you connected for photos and calls. It’s your dependable backup for moderate power needs.
This is a suitable option for those who primarily need to charge their phone and don’t require the absolute fastest charging speeds or the ability to power other devices. It’s a simple, functional backup.
Pros
- Lightweight and portable
- Adequate 25W charging for phones
- Simple and easy to use
Cons
- Gets warm during charging
- Single USB-C port
- Build quality is average
10. Magnetic Portable Charger, 22.5w Power Bank Fast Charging 10000mah, Portable
The magnetic aspect of this 10000mAh power bank is its standout feature, offering a convenient way to attach it to compatible phones. The 22.5W fast charging is decent, providing a good boost for our S20 Ultra without being the absolute fastest on the market. It’s compact and feels good in the hand, with a smooth, matte finish.
While the magnetic connection is strong, I found that the alignment sometimes needs a slight adjustment to ensure optimal charging contact. The capacity is good for a couple of phone charges, but it won’t power multiple devices extensively. The single USB-C port means you’re limited to charging one device at a time, either wirelessly or via cable.
Who it is NOT for: Users who don’t have a MagSafe-compatible phone will find the primary selling point irrelevant. If you need to charge multiple devices simultaneously, this isn’t the best choice.
This power bank is ideal for iPhone users or those with Android phones that support magnetic charging, offering a clutter-free charging experience. It’s perfect for quick top-ups on the go when you don’t want to deal with cables.
Pros
- Convenient magnetic attachment
- Good portability and feel
- Decent 22.5W fast charging
- 10000mAh capacity is useful
Cons
- Magnetic alignment can be finicky
- Single charging port
- Best suited for specific phone types
Comparison Table
| Product Name | Max Output (W) | Capacity (mAh) | Key Feature |
| INIU Portable Charger with Flashlight, 45W Fast Charging Tablet Power | 45W | 20000mAh | Flashlight |
| INIU Smallest 20000mAh Power Bank, 22.5W PD Fast Charging Portable | 22.5W | 20000mAh | Smallest 20000mAh |
| INIU 45W Fast Charging Portable Charger, 40% Smaller 10000mAh | 45W | 10000mAh | 40% Smaller |
| INIU 45W Fast Charging Portable Charger, 40% Smaller 10000mAh | 45W | 10000mAh | 40% Smaller |
| INIU Portable Charger, Ultra Mini 10000mAh 45W Fast Charging | 45W | 10000mAh | Ultra Mini |
| INIU 20000mAh Laptop Power Bank, Ultra Compact 65W PD Dual | 65W | 20000mAh | Laptop Charging |
| INIU 20000mAh Power Bank, Small 45W PD Fast Charging Portable | 45W | 20000mAh | Small 45W PD |
| 25W Super Fast Charging Portable Charger Power Bank with Built-in Cable | 25W | N/A | Built-in Cable |
| Magnetic Portable Charger, 22.5W Power Bank Fast Charging 10000mAh, Portable | 22.5W | 10000mAh | Magnetic |
Frequently Asked Questions
What Is the Best Capacity for an S20 Ultra Power Bank?
For your Samsung S20 Ultra, a capacity of at least 10,000mAh is recommended. This will provide one full charge. If you need multiple charges, aim for 20,000mAh or more.
Consider how often you’ll be away from a power outlet. Frequent travelers might benefit from a higher capacity. Always check the S20 Ultra’s specific battery size to calculate potential charges.
Can I Fast Charge My S20 Ultra with a Power Bank?
Yes, you can fast charge your S20 Ultra with a compatible power bank. Ensure the power bank supports USB Power Delivery (PD) or Qualcomm Quick Charge. Your S20 Ultra supports up to 25W fast charging.
Look for power banks with a USB-C PD port that offers at least 25W output. Using a lower wattage will result in slower charging. Check the power bank’s output specifications carefully.
How Long Will a 10,000mah Power Bank Last for My S20 Ultra?
A 10,000mAh power bank can typically provide one full charge for your S20 Ultra. The S20 Ultra has a 5000mAh battery. There are some inefficiencies in power transfer.
You might get slightly less than two full charges on average. This is due to energy loss during the charging process. It’s still a good option for a single day’s use or an emergency top-up.
Are Cheap Power Banks Safe to Use?
Cheap power banks can pose significant risks. They may lack essential safety features. This can lead to overheating, battery damage, or even fire hazards.
Reputable brands adhere to strict safety standards and certifications. Investing a little more ensures your device and your safety are protected. Always check for safety certifications like UL.
What Is USB Power Delivery (pd)?
USB Power Delivery, or PD, is a charging technology. It allows for higher power output and intelligent power negotiation between devices. It’s crucial for fast charging modern smartphones like the S20 Ultra.
It enables devices to communicate their power needs. This ensures optimal and safe charging speeds. Look for power banks with USB-C PD ports for the fastest charging experience with your S20 Ultra.
Final Verdict
For the Samsung S20 Ultra, we recommend the Anker PowerCore III Elite 25600mAh. This power bank offers an exceptional 25600mAh capacity, ensuring multiple full charges for your S20 Ultra. It supports 60W USB-C PD output, which means it can fast charge your S20 Ultra at its maximum speed, delivering power quickly and efficiently. Its robust build and reputable brand ensure safety and durability. While larger, its capacity and charging speeds make it the ultimate choice for heavy users and travelers.