Best overall for Samsung compatibility: Samsung’s 45W 20,000mAh Battery Pack. Best compact pick: Anker Nano 10K 45W. Best for a phone plus laptop: UGREEN’s 20,000mAh 100W power bank. The S23 Ultra supports up to 45W wired charging, but reaching Samsung’s fastest charging mode depends on the power bank’s USB-C Power Delivery with PPS support and a suitable 5A cable—not just a high wattage label.
What the Galaxy S23 Ultra needs from a power bank
Samsung rates the Galaxy S23 Ultra for a 5,000mAh battery and up to 45W wired charging. For the quickest compatible wired charging, look for USB-C Power Delivery (PD) with Programmable Power Supply (PPS). PD is the charging protocol; PPS lets compatible devices negotiate voltage and current dynamically. Samsung calls its 45W mode Super Fast Charging 2.0. A power bank can charge the phone without supporting PPS, but basic compatibility does not establish that it will deliver Samsung’s fastest mode. Samsung’s S23 Ultra specifications and its charging-accessory guidance explain the phone and accessory compatibility.
Forty-five watts is a maximum charging class, not a rate the phone draws continuously. An independent test measured about 57 minutes to charge from 1% to 100% with 45W USB PD PPS, compared with about 73 minutes using 25W PD PPS. Those are test results, not guaranteed times: battery level, temperature, cable, phone use and power-bank behavior all affect charging. Android Authority’s S23 Ultra charging test describes its measurements.
A 100W power bank will not charge the S23 Ultra at 100W. Its extra output matters if you also charge a laptop or other high-draw USB-C device. For the phone alone, a well-specified 45W PPS port can be a better fit than a higher-rated port without the right PPS profiles.
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- 【PPS 25W Super Fast Charging for Samsung Phones】The built in type c cord and usb c charging port adopts PPS fast charging technology with maximum power of 25 Watt, Support Super Fast Charging for Samsung devices. Super fast charge for Samsung Galaxy S25/S24 Ultra from 0% to 100% in just 1 hour, more faster than other 15W chargers.
- 【Fast Charging Four Devices Simultaneously】Portable charger for samsung has 9V/2A output USA ports X2, 25W USB C port X1 serves as both input and output, and additional 25W built in type c cable X1, which supports charge almost all smart devices on market. Total 4 charging ports, allowing for simultaneous charging of up to four devices, you would not need to carry various cables or adapter any more !!!
- 【Ultra Slim Size, 10000mAh Big Capacity】With the ultra compact and slim design, this lightweight power bank even 30% smaller than newest Sam sung S24 Ultra. You can carry it around in your pocket, specifically for travel, camping or any other outdoor activity. 10000mAh large capacity battery can charge for Samsung S24 up to 2 times. Portable Charger features digital led display, shows you the remaining battery level, ensuring you're always aware of your power bank's status.
- 【Reliable Security, Suitable for a Wide Range of Devices】The portable battery Equipped with intelligent protection over-charge, over-voltage, over-current, and short circuit for your devices. Compatible for Samsung Galaxy S26 Ultra / S26+/ S26 / S25 Ultra / S25+ / S25 / S24 Ultra / S24+ / S24 / S23 Ultra / S23+ / S23 / S22 Ultra / S22+ / S22 / S20 Ultra / Note 10 Plus / Tab S8 / S8 Ultra / S7 Plus, i Phone Duo/ i Phone 18 Pro/ i Phone 18 Pro Max/ i Phone 17/16/15/14 Pro Max and almost all the other devices.
- 【Package List & Customer Support】 Package included 10000mAh Slim portable charger X1. If you encounter any issues with the product during use under 12-months, simply let us know and we can make things right for you. Additionally, we provide 24/7 customer support to assist you with any questions or concerns you may have. (Note: The usb c port serve as both input and output, you can use your own cable to plug in the usb c port and a power source to charge the portable battery.)
Compare the leading options
| Power bank | Best for | Capacity and output | S23 Ultra charging evidence | Main trade-off |
|---|---|---|---|---|
| Samsung 45W 20,000mAh Battery Pack | Samsung-first compatibility and travel capacity | 20,000mAh / 74Wh; 45W Super Fast Charging 2.0 | Samsung explicitly lists S23 Ultra compatibility; included 5A cable | 403g (14.18oz); multi-device charging reduces output |
| Anker Nano Power Bank, 10K, 45W | Compact phone-first carry | 10,000mAh; 45W total output; USB-C, USB-A and retractable USB-C cable | 45W output is listed, but available evidence does not confirm S23 Ultra Super Fast Charging 2.0 or the required PPS profile | Less capacity than 20,000mAh packs; built-in cable is not as replaceable as a separate one |
| UGREEN 100W Fast Charge Power Bank | Phone plus laptop, tablet or other USB-C gear | 20,000mAh / 72Wh; USB-C1 up to 100W with PD and PPS; USB-C2 up to 30W; USB-A up to 22.5W | Manufacturer lists S23 Ultra compatibility and PPS on USB-C1 | 420g; 100W is unnecessary for the phone alone |
| INIU SnapGo Air 10,000mAh | Thin magnetic/wireless form factor | 10,000mAh; 45W wired; advertised up to 25W magnetic wireless | Independent coverage reports the specifications, but the wireless rate is not established for the S23 Ultra; Samsung-specific PPS behavior is not confirmed here | Magnetic attachment and wireless performance may depend on case and alignment; official purchase URL and current availability are not established |
The table distinguishes published output from verified Samsung fast-charging behavior. A “compatible” claim means the phone can charge; it does not by itself prove PPS, 45W operation or Super Fast Charging 2.0.
Which power bank fits your use?
Choose Samsung’s pack for the clearest Samsung match
Samsung’s 20,000mAh pack is the safest compatibility-first choice: the manufacturer names the S23 Ultra, specifies 45W Super Fast Charging 2.0 and includes a 5A USB-C cable. It has three ports, but do not expect 45W on each at once. Samsung says three connected devices can receive up to 15W per port, and Super Fast Charging 2.0 applies to one compatible device at a time. The pack weighs 403g, a meaningful addition to the 234g phone. Its US product page did not provide a reliable price in the available listing, so check the current price before buying.
Rank #2
- [45W Pro-Grade Speed] 0% to 75% in 30 Mins. Lab-tested with Samsung S26 Ultra—45W output pushes from empty to 75% in 30 minutes and reaches full 100% in 45 minutes. iPhone 17 Pro hits 65% in 30 minutes and 78% in 45 minutes. Powers Steam Deck, iPad Pro, and cameras at full speed. Active heat-dissipation shell keeps core temperatures under control while delivering pro-level power.
- [0.7" Ultra-Thin] Pockets Stay Flat, No Awkward Bulge. At just 4.3 x 2.7 x 0.7 inches and 40% smaller than an iPhone, this 10000mAh battery slides effortlessly into jeans, clutch bags, or belt packs—without that brick-like bulge that ruins your outfit. Pro power, compressed into a size that fits your lifestyle.
- [Grab & Go Built-in Cable] 3X Tougher Than Ordinary Plastic Cords. No more digging for loose cables or carrying extras. The integrated nylon-braided USB-C cord outlasts standard plastic wires by 3x in durability tests. Doubles as a carry lanyard—clip it to your bag and go. Unlike fixed-angle cables that snap under pressure, the reinforced joint flexes naturally as you use your phone while charging.
- [One for All] Powers Steam Deck, Switch, Tablets & More. 45W output means more than just phone charging. It delivers full-speed power to Steam Deck, Nintendo Switch, iPad Pro, cameras, and other USB-C devices—so you can carry one power bank for everything in your daily carry. No need to pack multiple chargers for different gadgets.
- [Paw Indicator + Emergency Light] Power at a Glance, Light When You Need It. Four glowing paws show your remaining battery—each paw lights up for approximately 25% power. No guesswork, no surprises. Built-in LED flashlight turns your power bank into a travel essential, ready for dark hotel rooms, power outages, or nighttime walks. 3-Year Care Plan: Issue in 3 years? A new one on us.
Choose Anker’s 10K for a compact, cable-included carry
The Anker Nano combines a 10,000mAh capacity, a retractable USB-C cable, a USB-C port and a USB-A port in a compact format. An independent review reports dimensions of 81 × 50 × 36mm and a $59.99 list price. Anker’s US collection showed approximately $54.99 sale / $59.99 list for this model on August 18, 2026; prices can change. Its integrated cable saves packing space, but cable damage is less easily remedied than replacing a separate cable. The available specifications do not establish that this particular model triggers Super Fast Charging 2.0 on the S23 Ultra, so treat it as a convenient 45W-class option rather than a confirmed Samsung-fast pick. See the independent Anker Nano review.
Choose UGREEN when you also need laptop power
UGREEN’s 20,000mAh model makes sense when the battery must serve more than the phone. Its USB-C1 supports PD and PPS at up to 100W, while USB-C2 is rated up to 30W and USB-A up to 22.5W; the product page specifies PPS on USB-C1, so use that port for the S23 Ultra. It recharges at up to 65W, weighs 420g and measures 139 × 80 × 26.5mm. The 72Wh capacity is below the commonly referenced 100Wh threshold for ordinary portable power banks, but airline policies still vary. It has no wireless charging. Choose it for shared laptop/tablet duty, not because its 100W rating makes the S23 Ultra charge faster.
Rank #3
- 30% Smaller, Effortlessly Portable: Leveraging industry-first TinyCell high-density battery technology, we’ve shrunk 20,000mAh into a frame 30% smaller than other power banks of the same capacity. At just 11.5oz—the weight of a 330ml can of cola, it slides effortlessly into your crossbody bag.
- 15 mins Faster with 45W Charging: Stop waiting and start exploring. Our 45W output is 15 minutes faster than traditional 22.5W power banks, boosting an iPhone 17 Pro from 20% to 76% in just 30 minutes—exactly the time it takes to finish an espresso.
- 2-Day Power, Zero Battery Anxiety: With a massive TSA-compliant 20,000mAh capacity, this power bank fuels your journey with about 4 full charges for phones or 2 full charges for tablets. From morning commutes to weekend getaways, stay powered and connected without ever being tethered to a wall.
- Simplify Your Carry: Never forget your cable again with the built-in braided USB-C cable. Tested for 10,000+ bends, it eliminates tangled wires in your bag. Plus, a built-in flashlight adds extra peace of mind for emergencies.
- Charge 3 Devices at Once: Low on battery? Charge up to 3 devices simultaneously—your phone, tablet, and more.
Consider INIU SnapGo Air for magnetic convenience, with caveats
TechRadar’s review reports a 10,000mAh capacity, 45W wired output, up to 25W magnetic wireless charging, two USB-C ports and a detachable USB-C cable. The reported weight is 196g and thickness 13.8mm; its US list price at launch on May 15, 2026 was $54.99. Those wireless specifications should not be read as an S23 Ultra-specific 25W promise. The S23 Ultra lacks Apple-style built-in MagSafe magnets, so magnetic attachment may require a compatible case or ring, and the camera bump can affect fit. The available information does not establish an official purchase page or current US availability. For the review’s specifications, see TechRadar’s SnapGo Air review.
Pick capacity by how you carry and charge
- 5,000mAh: Emergency top-ups in a very small package; less suited to a full day of heavy use.
- 10,000mAh: A practical portability choice for phone-first users.
- 20,000mAh: More useful for travel, several top-ups or charging more than one device, at the cost of substantially more weight.
- 25,000mAh and above: Better suited to extended trips or laptop-oriented use, but heavier and subject to closer airline-policy checks.
Capacity is stored energy; wattage is how quickly compatible devices can receive it. The mAh printed on a power bank usually describes its internal cells at roughly 3.6–3.7V, not energy delivered at the phone’s battery voltage. Voltage conversion, heat and charging losses mean a 20,000mAh bank does not provide four perfect recharges of a 5,000mAh phone battery. Actual results also depend on how much you use the phone while charging and the bank’s condition. Wh is more useful than mAh when comparing energy or checking travel rules.
Rank #4
- 【Portable Charger with the Built-In USB-C Connector】this power bank is widely compatible with iPhone 18 Pro/18 Pro Max/17/17Pro/17Pro Max/Air/16/16 Plus/16 Pro/16 Pro Max,15/15 Plus/15 Pro/15 Pro Max, iPad Air (4th/5th Gen), iPad Pro 11-in. (1st/2nd/3rd/4th Gen), iPad Pro 12.9-in. (3rd/4th/5th/6th Gen), iPad mini(6th generation), iPad(10th Gen), AirPods Pro(2nd Gen), Samsung Galaxy S27/S26/S25,Google Pixel, LG,Moto and other Android devices with USB C charging port.
- 【Ultra-Compact Portable Charger】 this mini portable charger size is only 3.2x1.96x1 inch, Super small and lightweight. You can put in your pocket, clutch bag or purse easily.
- 【PD Fast Recharging and Smart LCD Display】This mini iPhone 17 battery pack support PD quick speed charging,fully recharge this mini portable charger about 2-3 hours. Smart LCD display clearly show the remaining battery left.
- 【5000mAh Emergency Battery Backup Charger 】This power bank is 5000mAh Capacity Which is very suitable as a backup power supply for daily use,keeping your devices powered up wherever you go.
- 【Tips for Charging through Phone Case】This portable charger is compatible with phone case thickness less than 4MM. If your phone case thickness is beyond 4MM, the USB-C port can not plug into charging slot, you need to remove your phone case.
Use the right port and cable for fast charging
For 45W Samsung charging, use a USB-C-to-USB-C cable rated for 5A, often an electronically marked cable, and a power-bank USB-C port with PPS support. Samsung includes a 5A cable with its 45W pack. A 3A cable may still charge the phone, but can restrict the highest mode depending on the negotiated profile. A cable labeled 100W does not prove the power bank has PPS, and an integrated cable’s current rating should be checked rather than assumed.
Power sharing can change the result. On the Samsung pack, connecting three devices limits each port to up to 15W, and its 45W Super Fast Charging 2.0 mode is for one compatible device at a time. On UGREEN, the PPS-capable port is USB-C1; using another port or sharing output may change available power. Check each model’s port-specific output before connecting several devices.
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Best Value
- POWER ANYWHERE YOU WANT IT: Charge up any of your devices with the Galaxy Magnetic Wireless Battery Pack. Whether you want to plug in to the USB-C port or use the built-in magnetic wireless charger, the 5,000mAh battery is waiting to power you up throughout the whole day.
- CHARGE AND WATCH AT THE SAME TIME: Watch your favorite shows or scroll through posts while charging thanks to the included, sturdy kickstand on the Galaxy Magnetic Wireless Battery Pack. Snap your smartphone to the magnetic wireless charger and use the kickstand to enjoy content on your screen. Downtime doesn’t have to be downtime anymore.
- POWER UP YOUR GALAXY: Discover the battery pack to power your whole Galaxy. Galaxy Magnetic Wireless Battery Pack offers 5,000mAh to keep your devices charged when you need them. Keep it in your bag and pull it out any time to give your Galaxy devices a boost.
Wired or wireless charging?
Wired USB-C is the better choice when speed and energy efficiency matter, especially for a nearly empty phone, navigation, gaming or a hot environment. Wireless charging is convenient for short top-ups or cable-free use, but is generally less efficient and can create more heat. A power bank’s advertised wireless wattage may refer to a device-specific mode and does not guarantee that the S23 Ultra receives that rate.
Magnetic power banks need particular care with the S23 Ultra: it does not have built-in MagSafe magnets, and attachment may require a magnetic case or ring. Case thickness, camera-bump clearance and alignment can affect stability. Treat magnetic charging as a convenience feature, not a substitute for a verified PPS wired connection.
Taking a power bank on a flight
The Samsung 20,000mAh pack is marked 74Wh and UGREEN’s 20,000mAh model is 72Wh; both are below the commonly referenced 100Wh threshold for ordinary portable power banks. This is not a blanket airline approval: rules can differ by carrier and route and may change. Spare lithium batteries generally belong in carry-on baggage rather than checked luggage. Check your airline’s current policy and keep the watt-hour marking visible.
Troubleshoot ordinary charging or a slow 100W bank
If the phone does not show Super Fast Charging
- Connect to the power bank’s USB-C port, not USB-A, and use USB-C-to-USB-C.
- Confirm that the specific port supports PPS; a general PD or “Samsung-compatible” label is not enough.
- Try a 5A-rated cable if the bank supports the required PPS profile.
- Disconnect other devices and check that low-power or trickle mode is not enabled.
- Test with the phone cool and the screen mostly off; a nearly empty or hot bank can also limit output.
- Review the phone’s charging settings in the current One UI version. Menu wording may vary, so use the settings search rather than relying on a fixed path.
If a 100W bank charges slowly
Check whether PPS is on the port you are using, whether the cable supports the needed current, and whether other devices are drawing power. A 100W headline can describe laptop-oriented output profiles rather than Samsung PPS. For example, UGREEN specifies PPS on USB-C1, not USB-C2; use USB-C1 for the S23 Ultra.
Quick Recap
If the bank seems to provide too few recharges or keeps disconnecting
- Fewer recharges than the printed mAh suggests are expected because conversion losses reduce usable output; phone use and heat can reduce it further.
- For charging that stops and starts, check for a loose or damaged cable, a dirty phone port, heat, power-bank auto-shutoff or cable strain while using the phone.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
