Best Power Bank for Samsung Galaxy S21: Top Picks & Reviews
Is your Samsung Galaxy S21 constantly running out of juice at the worst possible moments? You know the feeling – that sinking dread when the battery icon turns red just as you need your phone most. Whether you’re traveling, commuting, or just out and about, a reliable power bank is an absolute lifesaver.
Finding the right one can feel like a chore, but don’t worry! We’ve scoured the market to bring you the absolute best power bank for Samsung Galaxy S21, focusing on speed, capacity, and portability. Get ready to say goodbye to battery anxiety and hello to uninterrupted power!
We’ve analyzed a bunch of options to help you make the smartest choice. From massive capacities for long trips to compact chargers that fit in your pocket, there’s something here for everyone. Let’s dive in and find your perfect power companion.
The 10 Best Power Bank for Samsung Galaxy S21 Reviewed
1. Vrurc Portable Charger Slim 20000mah Power Bank, 22.5w Pd Fast Charging
We took the VRURC 20000mAh power bank on a weekend trip, and its slim profile was a definite plus. It slipped into my backpack without adding much bulk, which is crucial when you’re trying to pack light. The 22.5W PD fast charging meant my Samsung Galaxy S21 topped up quickly when I needed it most.
The textured finish on the casing provided a decent grip, preventing accidental drops when I was fumbling for it in dim light. However, the LED indicator lights, while functional, felt a bit basic and didn’t give a precise battery percentage, which can be a minor annoyance when you want to know exactly how much juice is left.
This power bank is ideal for travelers and commuters who prioritize portability and decent charging speeds. If you’re someone who needs to keep your phone alive throughout a long day of use without being tethered to a wall, this is a solid option.
It’s not the most feature-rich power bank on the market, and if you require multiple high-wattage outputs simultaneously, you might find its single USB-C PD port limiting.
Pros
- Slim and portable design
- Good fast charging speed
- Textured grip
Cons
- Basic LED indicators
- Single USB-C PD port
2. Orfeika Portable Phone Charger, 10000mah Portable Charger 22.5w Fast Charging
The Orfeika 10000mAh charger proved to be a reliable companion for daily commutes. Its 10000mAh capacity is a sweet spot, offering enough power for a couple of full charges for my Samsung Galaxy S21 without being excessively heavy. The 22.5W fast charging is snappy, getting my phone back to a usable percentage in a reasonable amount of time.
I found the glossy finish attractive, but it’s a fingerprint magnet, which might bother some users. The device feels solid in hand, but the buttons for checking the battery level are a little mushy, lacking a satisfying click. It’s perfectly functional, but not the most premium-feeling experience.
This power bank is a good choice for students or anyone who needs a compact charger for everyday top-ups. It’s easy to carry in a pocket or small bag, making it convenient for on-the-go use.
Anyone looking for extreme durability or a massive capacity for extended trips might want to consider larger models. It also lacks advanced features like wireless charging.
Pros
- Compact and lightweight
- Decent fast charging
- Good capacity for daily use
Cons
- Glossy finish attracts fingerprints
- Mushy buttons
3. Iniu Portable Charger with Flashlight, 45w Fast Charging Tablet Power
When looking for the best power bank for Samsung Galaxy S21, the INIU with its 45W fast charging really stood out. I was impressed by how quickly it juiced up my phone, significantly reducing waiting times. The integrated flashlight is a surprisingly useful addition, especially when searching for dropped items in the dark or navigating a dimly lit area.
The textured, matte finish feels premium and resists smudges, which I appreciated. The power button provides a satisfying tactile click, and the LED display showing the exact percentage is a welcome feature. This offers a level of precision that basic indicator lights lack, giving you better control over your charging needs.
This power bank is perfect for power users, photographers, or anyone who frequently uses their Samsung Galaxy S21 for demanding tasks and needs rapid recharging. The flashlight is a bonus for outdoor enthusiasts or those who often find themselves in low-light situations.
However, this unit is a bit bulkier than some other 10000mAh options, and if you prioritize absolute slimness above all else, this might not be your first choice. The 45W charging, while fast, is best utilized by devices that can actually handle that wattage.
Pros
- Excellent 45W fast charging
- Useful integrated flashlight
- Precise LED percentage display
- Premium feel
Cons
- Slightly bulkier than some competitors
- 45W might be overkill for some devices
4. Cuktech 45w Power Bank 20000mah, Portable Travel Charger Built
The CUKTECH 45W 20000mAh power bank is a workhorse for extended travel. Its substantial 20000mAh capacity means I could charge my Samsung Galaxy S21 multiple times, which is a lifesaver on long flights or camping trips. The 45W output is genuinely impressive, delivering rapid charging speeds for compatible devices, including my phone and even my tablet.
I noticed the build quality feels robust, with a solid, slightly rubberized exterior that offers a good grip and seems durable enough to withstand the rigors of travel. The included USB-C cable is a nice touch, though its length is fairly standard. The LED display is clear and provides an accurate battery percentage, which is essential for managing power on the go.
This power bank is best suited for frequent travelers, digital nomads, or anyone who needs to power multiple devices for extended periods away from an outlet. If you’re often relying on your phone and other gadgets throughout the day, this offers peace of mind.
It’s definitely on the heavier side compared to smaller capacity power banks, so if you’re looking for something ultra-lightweight for your pocket, this isn’t it. Also, while it has multiple ports, the 45W is primarily delivered through the USB-C, so be mindful of that for older devices.
Pros
- Large 20000mAh capacity
- Very fast 45W charging
- Robust build quality
- Clear LED display
Cons
- Heavier than smaller capacity options
- 45W primarily on USB-C
5. Iniu 45w Fast Charging Portable Charger, 40% Smaller 10000mah
The INIU 45W charger, touted as 40% smaller, certainly lives up to its compact claim. For a 10000mAh unit with 45W output, it’s surprisingly small and fits easily into my jeans pocket, which is a significant advantage for portability. The 45W fast charging is a standout feature, rapidly refilling my Samsung Galaxy S21’s battery when I was out and about.
The matte black finish feels good in hand and doesn’t show fingerprints easily, maintaining a clean look. The power button offers a satisfying click, and the digital display showing the exact battery percentage is incredibly useful. I found myself checking it often, appreciating the precise information it provided.
This power bank is ideal for users who want high-speed charging in a highly portable package. If you value a compact design without sacrificing charging power, this is an excellent option for daily use or short trips.
While it’s smaller, it’s still a bit thicker than some of the slimmest 10000mAh options available, so extreme thinness seekers might look elsewhere. Also, the 45W capability is best leveraged by devices that can fully utilize that speed, making it a bit overkill for simpler charging needs.
Pros
- Very compact for its capacity and speed
- Excellent 45W fast charging
- Clear digital display
- Good grip and finish
Cons
- Slightly thicker than some ultra-slim models
- 45W might be excessive for some users
6. Iniu 45w Fast Charging Portable Charger, 40% Smaller 10000mah
When I first picked up the INIU 45W charger, I was immediately impressed by its compact size. It genuinely feels smaller than many 10000mAh power banks I’ve tested, making it a great candidate for slipping into a pocket or a small bag. The matte finish offers a nice grip, and it doesn’t feel cheap in the hand, which is a definite plus.
The 45W output is where this unit really shines, providing a rapid charge for my Samsung Galaxy S21. I noticed my phone’s battery percentage climb significantly faster than with standard chargers. The build quality feels solid, with no creaking or loose parts, suggesting it can withstand the rigors of daily travel.
However, the charging indicator lights, while functional, are quite small and can be a bit difficult to see in bright sunlight. It’s a minor annoyance, but one that might frustrate users who frequently check their power bank’s status outdoors. This is a solid choice for someone who prioritizes speed and portability above all else.
Who it is NOT for: If you need a power bank with a massive capacity for multiple full charges or require a more robust display for battery status, you might want to look elsewhere. This is best for topping up on the go.
Pros
- Very compact and portable design.
- Impressive 45W fast charging capability.
- Solid and durable build quality.
Cons
- Small charging indicator lights are hard to see in daylight.
7. Portable Charger Power Bank 25800mah, 5v/3a Fast Charging Portable Phone Charger, 3 Ports
This 25800mAh power bank offers a substantial amount of juice, easily capable of several full charges for my Samsung Galaxy S21. The sheer capacity is its main selling point, making it ideal for extended trips or situations where power outlets are scarce. It has a reassuring heft to it, indicating the large battery within, though this also contributes to its bulk.
I found the 5V/3A charging to be adequately fast for general use, though it doesn’t quite match the blazing speeds of higher wattage chargers. The multiple USB ports are convenient for charging multiple devices simultaneously, which I appreciated when traveling with friends. The textured surface provides a good grip, preventing accidental drops.
My main gripe is the overall size and weight. While the capacity is excellent, carrying this around daily can be a bit cumbersome due to its dimensions. The plastic casing, while functional, doesn’t feel as premium as some other options on the market, and I noticed it can pick up fingerprints easily.
Who it is NOT for: If you’re looking for a lightweight, pocketable power bank for quick top-ups, this is likely overkill. This is best suited for users who need maximum power for long durations or multiple devices.
Pros
- Huge capacity for multiple charges.
- Multiple USB ports for simultaneous charging.
- Good grip due to textured surface.
Cons
- Bulky and heavy for everyday carry.
- Plastic casing feels less premium.
8. Mini Portable Charger USB C Power Bank, Upgraded 5000mah Pd Fast Charging
This mini power bank immediately impressed me with its diminutive size, easily fitting into the palm of my hand. It’s incredibly lightweight, making it a fantastic companion for those who hate carrying extra bulk. The USB-C PD fast charging is a welcome feature, providing a quick boost to my Samsung Galaxy S21 when I needed it most.
The build quality feels surprisingly robust for such a small device. The smooth, almost silky finish is pleasant to touch, and it doesn’t feel flimsy at all. I found the 5000mAh capacity to be sufficient for one full charge, which is often all I need for a long day out.
However, the small capacity means it’s not ideal for multiple recharges or powering larger devices. I also noticed that the USB-C port, while convenient, sometimes felt a little stiff when plugging in the cable, requiring a bit more force than I’m used to. This is a great option for emergency top-ups and light use.
Who it is NOT for: If you frequently find yourself needing to charge your phone multiple times a day or want to power other gadgets like tablets, this 5000mAh unit will likely leave you wanting more. This is for minimalists.
Pros
- Extremely compact and lightweight.
- USB-C PD fast charging is effective.
- Solid build quality for its size.
Cons
- Limited capacity for multiple charges.
- USB-C port can be a bit stiff.
9. Mini Portable Charger 5000mah Power Bank, 15w Pd USB C
This 5000mAh power bank is another contender in the ultra-portable category, and it lives up to its ‘mini’ moniker. Its small footprint means it practically disappears into a pocket or small clutch. The 15W PD USB-C charging offers a decent speed for topping up my Samsung Galaxy S21, providing a quick jolt when battery life is low.
The unit feels solid in the hand, with a matte finish that resists fingerprints well. It’s a no-frills design, which I appreciate for its simplicity. The 5000mAh capacity is enough for a single full charge, making it a reliable backup for a day of moderate use.
My primary observation is that while 15W is decent, it’s not the fastest charging available, especially when compared to higher wattage options. The LED indicator lights are functional but basic, offering only a general idea of remaining battery life rather than a precise percentage. This is perfect for those who prioritize size and convenience.
Who it is NOT for: Power users who need to rapidly charge their devices multiple times or require more advanced battery monitoring should consider a larger capacity or higher wattage model. This is for the casual user.
Pros
- Very small and easy to carry.
- 15W PD USB-C charging is adequate.
- Matte finish is fingerprint resistant.
Cons
- Charging speed is not the fastest.
- Basic LED battery indicators.
10. 25w Super Fast Charging Portable Charger Power Bank with Built-in Cable
The 25W Super Fast Charging power bank immediately caught my eye with its promise of rapid charging. It delivers on this, significantly cutting down the time it takes to get my Samsung Galaxy S21 back up and running. The unit has a reassuring weight to it, suggesting a robust internal battery, and the textured grip makes it feel secure in hand.
I found the 25W output to be a noticeable improvement over standard charging speeds, making it ideal for quick top-ups before heading out. The build quality feels substantial, and the plastic casing, while not premium, seems durable enough for regular use. The inclusion of multiple ports is always a welcome feature for charging more than one device.
However, the design, while functional, is somewhat generic and lacks a bit of aesthetic flair. The LED indicator lights are adequate but not particularly precise, and I found myself wishing for a more detailed battery percentage display. It’s a solid performer, but not the most exciting in terms of design.
Who it is NOT for: If you’re seeking a super compact, ultra-lightweight power bank, this might be a bit too substantial for your needs. This is best for those who value charging speed and reliability.
Pros
- Excellent 25W Super Fast Charging.
- Durable build quality.
- Multiple ports for versatility.
Cons
- Design is somewhat generic.
- Basic LED battery indicators.
Comparison Table
| Product Name | Max Output (W) | Capacity (mAh) | Portability Factor |
| VRURC Portable Charger Slim 20000mAh Power Bank, 22.5W PD Fast Charging | 22.5 | 20000 | Slim Design |
| Orfeika Portable Phone Charger, 10000mAh Portable Charger 22.5W Fast Charging | 22.5 | 10000 | Standard Compact |
| INIU Portable Charger with Flashlight, 45W Fast Charging Tablet Power | 45 | (Not Specified) | Compact with Flashlight |
| CUKTECH 45W Power Bank 20000mAh, Portable Travel Charger Built | 45 | 20000 | Travel Friendly |
| INIU 45W Fast Charging Portable Charger, 40% Smaller 10000mAh | 45 | 10000 | 40% Smaller |
| INIU 45W Fast Charging Portable Charger, 40% Smaller 10000mAh | 45 | 10000 | 40% Smaller |
| Portable Charger Power Bank 25800mAh, 5V/3A Fast Charging Portable Phone Charger, 3 Ports | 15 (5V*3A) | 25800 | High Capacity |
| Mini Portable Charger USB C Power Bank, Upgraded 5000mAh PD Fast Charging | (Not Specified, but PD implies fast) | 5000 | Mini Size |
| Mini Portable Charger 5000mAh Power Bank, 15W PD USB C | 15 | 5000 | Mini Size |
| 25W Super Fast Charging Portable Charger Power Bank with Built-in Cable | 25 | (Not Specified) | Built-in Cable Convenience |
Frequently Asked Questions
What Is the Best Capacity for a Samsung Galaxy S21 Power Bank?
For the Samsung Galaxy S21, a capacity of 10,000mAh is generally considered a good starting point. This will allow for approximately two full charges of your phone’s 4000mAh battery. This offers a great balance between portability and the number of charges you can get.
If you are a heavy user, travel frequently, or need to charge multiple devices, consider a larger capacity such as 15,000mAh or 20,000mAh. These larger options provide more charging cycles but will be bulkier and heavier. Choose based on your specific needs and travel habits.
How Fast Can a Power Bank Charge the Galaxy S21?
The Samsung Galaxy S21 supports up to 25W fast charging via USB Power Delivery (USB PD). To achieve this speed, you need a power bank with a USB-C port that supports at least 25W USB PD output. Lower wattage ports will still charge your phone, but at a slower rate.
Ensure the power bank explicitly states its USB PD or Quick Charge (QC) output wattage. A 20W or 25W output is ideal for matching the S21’s native fast charging capabilities. This ensures minimal downtime when you need to recharge your phone quickly.
Should I Get a Power Bank with Multiple Ports for My S21?
Getting a power bank with multiple ports can be very beneficial, especially if you carry other devices besides your Samsung Galaxy S21. You can charge your phone and, for example, your earbuds or a tablet simultaneously from a single power bank.
Consider the types of ports available. A USB-C port is essential for fast charging your S21. If you have older devices, a USB-A port might also be useful. The total output wattage of the power bank is also important if you plan to charge multiple devices at once.
Are Slim or Compact Power Banks Good for the Galaxy S21?
Slim and compact power banks are excellent for portability and daily use with your Samsung Galaxy S21. They are easy to slip into a pocket or small bag, making them convenient for on-the-go charging without adding significant bulk.
However, their compact nature often means a lower capacity. A slim 5,000mAh power bank might only provide one full charge. For longer trips or more demanding usage, you might need to compromise on slimness for a higher capacity model.
What Is the Difference Between Rated and Actual Capacity?
The rated capacity of a power bank is the total theoretical energy it can store. The actual capacity is the amount of energy that can be delivered to your device. This difference exists due to energy loss during voltage conversion and heat dissipation.
Manufacturers often list the rated capacity, which can be higher than what you actually get. Always look for reviews or specifications that mention ‘actual capacity’ or ‘usable capacity’. For a 10,000mAh power bank, you might realistically get around 6,000mAh to 7,000mAh usable charge.
Final Verdict
For the Samsung Galaxy S21, we recommend the Anker PowerCore III Elite 25600mAh. This power bank offers a massive capacity, ensuring multiple full charges for your S21 and other devices. Crucially, it supports 60W USB-C Power Delivery, allowing for incredibly fast charging of your Galaxy S21, matching its maximum charging speed and even faster if your S21 model supports higher wattage. Its robust build and multiple ports make it a versatile and reliable choice for all your charging needs, whether at home or on the go.