Best Power Banks for Samsung Galaxy S21+ and S21 Ultra

At this point, I think we can agree that Samsung is here to stay at the top of the smartphone industry. They have the funds and the technical know-how to create the best phones in the market, shown every year. However, let’s be honest with ourselves; Samsung somewhat dropped the ball with the Galaxy S20. Without providing much innovation, it fell short.

Samsung is back, though, with the Samsung Galaxy S21, and they are coming back stronger than ever. The new phone comes with three different tiers, with there being an S21, S21+, and S21 Ultra, and each of them brings something new that may make it worth upgrading. The first thing to know is that all S21 smartphones now use the new Exynos 2100 chip. The first two models each have 8GB of RAM, while the Galaxy S21 Ultra has a 12GB or a 16GB RAM option, and yes, that is a lot of RAM and more than what most laptops have.

The most notable part of the Galaxy S21 is that they have 120Hz refresh rate screens, higher than the 90Hz from last year and what was thought to be the standard. To add to a higher refresh rate, these new models also have larger batteries. The Galaxy S21 has a 4,000mAh battery, the S21+ has a 4,800mAh battery, and the Galaxy S21 Ultra has a 5,000mAh battery. Those are all huge batteries, and for good reasons, simply because all these phones can use a ton of power when using their specs.

With all these high-end specs in use when you’re going about your day, using a power bank is a great choice. A high refresh rate screen can burn into battery power a lot faster than you think, especially with a 120Hz screen. In this guide, we’re covering power banks for the Galaxy S21 that can get the phone charged up so you can keep using all its features without any breaks.

RAVPower 20,000mAh Tri Output and Input Power Delivery Power Bank

Since the Galaxy S21 has such large batteries across the board, with the S21 Ultra reaching a 5,000mAh battery, it only makes sense to go for power banks that have higher power capacities, at least, that’s what we’re starting out with.

This RAVPower portable charger has a 20,000mAh power capacity, enough to charge the S21 Ultra to full power about three times; the other two models that have smaller batteries will be able to charge three times as well. However, with the other two models, you may have more power capacity left over to use. However, a high power capacity is relative to the portable charger that we’re recommending the smartphone to. In this case, a 20,000mAh power bank is pretty good for charging these phones at least twice or more.

On the charging side, you’re going to need a Power Delivery power bank, as that’s the primary fast charging that the Galaxy S21 uses. This power bank has an 18W USB-C Power Delivery port, and so you’re able to fast charge with it. This RAVPower charger also has a Quick Charge 3.0 USB-A port and a standard 12W USB-A port. You can use the Quick Charge 3.0 port for fast charging, but it’s always best to use a USB-C PD port for more stable charging.

To recharge this power bank, you have three ports to do so. You can use the same USB-C Power Delivery port to restore the power bank or use a Micro-USB input port or a Lightning input port. With all the charging power, this power bank also has an LCD that shows the remaining power capacity and shows if you’re using fast charging such as the Power Delivery or Quick Charge port.

Review for RAVPower 20,000mAh Power Delivery Power Bank

Specs of the RAVPower 20,000mAh USB-C PD Power Bank:

  • Power Capacity: 20,000mAh
  • Output:

Quick Charge Port: 5V/3.0A | 9V/2.0A | 12V/1.5A (18W)

USB-C Power Delivery Port: 5V/3.0A | 9V/2.0A | 12V/1.5A (18W)

Standard USB-A Port: 5V/2.4A (12W)

  • Input:

USB-C Input: 5V/3.0A | 9V/2.0A | 12V/1.5A (18W)

Micro-USB Input: 5V/3.0A | 9V/2.0A | 12V/1.5A (18W)

Lightning Input: 5V/2.1A

  • LED Power Indicator: Digital Power Display
  • Size: 6.2 x 2.9 x 0.6 inches
  • Weight: 1 Pound

Aukey 10,000mAh 10W Wireless Charging Power Delivery Power Bank

Samsung has already announced that they’re releasing new wireless chargers along with their Galaxy S21; however, wireless chargers alone can be limiting. How about a wireless charging power bank? That’s what this Aukey power bank is.

This Aukey power bank has a 10,000mAh power capacity, so you’ll be getting a single full charge for your S21 Ultra. For the regular S21 and the S21+, you’ll fair about a single charge as well, but with more power capacity left over. It’s strange to say that, because not too long ago Samsung phones had 3,000mAh batteries and a 10,000mAh power bank would be able to charge them up twice.

The charging power is not lacking on this Aukey power bank, as the charger has an 18W Power Delivery port for fast charging, or you can use the Quick Charge 3.0 USB-A port. There is also wireless charging at the top of the power bank, where you can place your S21. This power bank does feature 10W fast wireless charging for Qi wireless charging Samsung smartphones and 7.5W fast wireless charging for Qi-compatible iPhones.

You have two options to recharge this power bank, either through a Micro-USB input port or through the USB-C PD port. The power bank size is a significant part as the charger only has a length of 5.6 inches and a thickness of 0.6 inches.

Read Review for Aukey 10,000mAh Wireless Charging Power Bank

Quick Charge Port5V/3A | 9V/2A | 12V/1.5A (18W)
USB-C PD Port5V/3A | 9V/2A | 12V/1.5A (18W)
Samsung Phones Wireless Charging10W
iPhone Wireless Charging7.5W
Other Wireless Charging Smartphones5W
USB-C Input5V/3A | 9V/2A
Micro-USB Input5V/2A | 9V/2A
LED Power IndicatorFour White Power Capacity Indicators | Orange Indicator for Wireless Charging
Size5.6 x 2.6 x 0.6 inches
Weight8 Ounces

Xcentz 5,000mAh 18W USB-C Power Delivery Mini Power Bank

Adding such a low capacity power bank such as this Xcentz portable charger feels somewhat awkward, but it has its place. This Xcentz power bank has a 5,000mAh power capacity, the same battery size as the S21 Ultra, so you can come close to getting the S21 Ultra to full power, and the same can be said about the other two models.

So if you don’t mind just keep your Samsung phone charged up through the day and needing to recharge the power bank at the end of the day, then the power capacity won’t be a problem.

The charging is the main reason we’re recommending this power bank, as it features a USB-C Power Delivery port and a Quick Charge 3.0 port. Power banks with such a lower power capacity usually don’t feature two fast charging ports; they don’t even have one. What makes the whole package better is you get a USB-C to USB-C cable and a USB-C to USB-A cable included in the box, so you can start charging your S21 right out of the box.

Read Review for Xcentz 5,000mAh 18W Power Delivery Power Bank

Specs of the Xcentz 5,000mAh Power Bank with PD and Quick Charge:

  • Power Capacity: 5,000mAh
  • Output:

USB-C Power Delivery Port: 18W

USB-A Port: 18W

  • Input:

USB-C Port: 18W

  • LED Power Indicator: Four Blue Power Indicators
  • Size: 3 x 1.4 x 1.1 inches
  • Weight: 3.6 Ounces

CHOETECH Power Delivery USB-C and Lightning Built-in Power Bank

With most power banks, you have to plug a cable into the ports to use it. The problem with that is you always have to remember to bring a cable with it, and if the cable is plugged in, it can be uncomfortable to place the power bank in your pocket.

That’s why this CHOETECH power bank with built-in cables is a great choice. The charger has a USB-C and Lightning built-in cable, and both of them feature an 18W Power Delivery charging speed. There are no output ports on this power bank, but there is a USB-C input port that is only used to recharge the power bank and you can recharge the power bank at Power Delivery speeds with a PD wall charger.

The cables on this power bank fit directly into the charger when you’re not using it, so you don’t have to worry about them getting in the way. This CHOETECH power bank has a 10,000mAh power capacity, just the right amount to keep your Galaxy S21 charged up for about two days before needing to recharge the power bank.

Read Review for CHOETECH USB-C and Lightning Cable Power Bank

 CHOETECH 10,000 B688 Power Delivery USB-C / Lightning Built-in Cable Power Bank Specs
Power Capacity10,000mAh
Built-in USB-C Cable5V 3A | 9V/2A | 12V/1.5A
Built-in Lightning Cable5V 3A | 9V/2A | 12V/1.5A
USB-C (Input)5V/3A | 9V/2A
Size5.75 x 2.72 x 0.67 inches
Weight8 Ounces

RAVPower 30,000mAh 90W Power Delivery Bank

A very high power capacity power bank such as this RAVPower one with a 30,000mAh battery might be needed if you’re a Galaxy S21 user. The S21 is an absolute powerhouse of a phone with a massive battery, so if you want a power bank that can keep it charged for days and not have to worry about recharging the power bank for a couple of days, then this is for you. Also, with a 30,000mAh power capacity, you can use it to charge other devices too.

The charging power from this RAVPower charger may be a bit much, but you can use it if you have the right devices. There are two output ports, a 90W USB-C Power Delivery port, and a Quick Charge 3.0 USB-A port. You can use the 90W USB-C PD port to charge your Galaxy S21, and don’t worry it won’t damage the phone. A 90W charging speed can also charge USB-C Power Delivery compatible laptops, as most do charge using USB-C.

Even if you’re charging two devices at the same time, the Power Delivery port is still able to output 65W, so you can fast charge your S21 and another phone at the same time. You can also recharge this power bank at 60W with a Power Delivery wall charger. However, a PD wall charger is not included in the box, but you do get a USB-C to USB-C cable to start using the power bank immediately.

Read Review for RAVPower 30,000mAh 90W Power Delivery Power Bank

 RAVPower 30,000mAh 90W Power Delivery Power Bank PB232 Specs
Power Capacity30,000mAh
USB-C Power Delivery Port5V/3A | 9V/3A | 12V/3A | 15V/3A | 20V/4.5A, 90W Max
USB-A Quick Charge Port5V/3A | 9V/2A | 12V/1.5A, 18W Max
Max Output when using Both PortsPD 65W + iSmart 18W, Total 83W Max
USB-C (Input)5V/3A | 9V/3A | 12V/3A | 15V/3A | 20V/3A, 60W Max
Size5.9 x 3.4 x 1 inches
Weight1.1 Pounds

Odec 20,000mAh 20W Power Delivery and Dual Quick Charge Power Bank

This Odec power bank is all about fast charging, and that’s because it has a single USB-C Power Delivery port and two USB-A Quick Charge ports. Most power banks only have a single Quick Charge port when they do feature fast charging. The Power Delivery port on this Odec power bank has a 20W charging speed, so you are getting a bit more power, but that’s mostly meant for the new iPhone 12 that upgraded its charging, you’ll still be getting the same fast charging for the Galaxy S21. The power bank can only be recharged via its USB-C port, as there is no Micro-USB input port.

This Odec portable charger’s power capacity is 20,000mAh, a fair amount for charging up your S21 to full power about three times before needing to recharge the power bank. The charger includes a USB-C to USB-C cable, so you’re able to start charging as soon as you get it and you can recharge it using the same cable.

Read Review for Odec 20,000mAh 20W Power Delivery Power Bank

 Odec 20,000mAh 18W Power Delivery - Quick Charge Power Bank Specs
Power Capacity20,000mAh
USB-C Power Delivery Port18W
USB-A Quick Charge Ports18W
Max Output18W
Power Delivery Input18W
Size5.6 x 2.7 x 1.1 inches
Weight14.5 Ounces

BCMASTER 10,000mAh USB-C Power Delivery Power Bank

Yet another simple power bank, this one comes from BCMASTER. The charger has a 10,000mAh power capacity, so you’ll be able to get about one full charge for the S21 Ultra with some left over power capacity since the phone has such a large battery. The S21 and S21+ may fair better with them having smaller batteries, so you’ll have more left over power capacity that you can use later.

The charging on this BCMASTER power bank is simple, with there being a USB-C Power Delivery port and a Quick Charge 3.0 USB-A port. You can fast charge your S21 using either of the ports, and you can recharge the power bank via the USB-C Power Delivery port or at Quick Charge speeds via the Micro-USB input port.

This power bank is also very slim at a 0.6-inch thickness that can easily slide into your pocket along with your Galaxy S21.

Read Review for BCMASTER 18W Power Delivery Power Bank

 BCMASTER 10,000mAh 18W Power Delivery Quick Charge Power Bank Specs
Power Capacity10,000mAh
USB-A Port5V–6V/3A | 6V–9V/2A | 9V–12V/1.5A
USB-C Power Delivery Port5V/3.0A | 9V/2.0A | 12V/1.5A
USB-C PD Input5V/3.0A | 9V/2.0A
Micro-USB Input5V/2A
Size5.7 x 2.6 x 0.6 inches
Weight8.1 Ounces

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