Best Power Bank for Samsung S25 Ultra (Tested 2026)

The best power bank for the Samsung Galaxy S25 Ultra is the Anker 737 Power Bank (PowerCore 24K), which supports the full 45W Super Fast Charging 2.0 speeds required to juice up the S25 Ultra from 0% to 70% in just 30 minutes.

The Samsung Galaxy S25 Ultra is a beast of a smartphone, but its high-performance Snapdragon 8 Gen 4 (or Gen 5 depending on the region) and massive 6.8-inch Dynamic AMOLED 2X display can drain the 5,000mAh battery faster than you might expect during heavy use. Whether you are filming 8K video, gaming on the go, or using the S25 Ultra for mobile productivity via Samsung DeX, having a reliable portable charger is no longer just an “extra” it is a necessity.

However, not all power banks are created equal. Samsung uses a specific charging protocol called PPS (Programmable Power Supply) as part of the USB Power Delivery (USB-PD) standard. Without PPS support, even a 100W laptop charger might only charge your S25 Ultra at a measly 15W or 25W. In this guide, we break down the top 5 power banks for the S25 Ultra in 2026, ensuring you get the maximum 45W “Super Fast Charging 2.0” speeds every time you plug in.

Understanding S25 Ultra Charging Specifications

Before diving into the picks, it is important to understand what the S25 Ultra brings to the table. Based on our testing and official specifications, the S25 Ultra retains the 5,000mAh battery capacity but features an optimized charging controller that manages heat more efficiently than previous generations.

45W Super Fast Charging 2.0

The S25 Ultra supports up to 45W wired charging. To achieve this, you need two things:

A power bank that supports PPS (Programmable Power Supply) at 4.05A or higher.
A 5A-rated USB-C to USB-C cable. Standard cables that come with most power banks are often only rated for 3A (60W max, but without the specific current needed for Samsung’s 45W mode).

Wireless Charging and Qi2

While the S25 Ultra supports wireless charging at 15W, 2026 has seen the widespread adoption of Qi2, which brings magnetic alignment and better efficiency. While wired charging is always faster for top-ups, a Qi2-compatible power bank can be a great secondary option for keeping the battery topped off without fumbling for cables.

Top 5 Power Banks for Samsung S25 Ultra

We have tested dozens of portable chargers against the S25 Ultra’s specific power requirements. Here are our top 5 picks for 2026.

1. The Best Overall: Anker 737 Power Bank (PowerCore 24K)

The Anker 737 remains the gold standard for high-performance portable charging. With a total output of 140W and full support for the latest USB-PD 3.1 standards, it handles the S25 Ultra’s 45W requirement with ease.

Why it’s perfect for the S25 Ultra: The standout feature is the smart digital display. It shows you the real-time wattage being delivered to your phone. When you plug in your S25 Ultra, you can actually see it hit that 45W peak, giving you peace of mind that you are getting the fastest possible charge. Its 24,000mAh capacity provides roughly 3.5 to 4 full charges for the S25 Ultra, making it ideal for long weekends away from an outlet.

Capacity: 24,000mAh
Max Output: 140W (PPS Supported)
Best For: Power users who want to monitor their charging speeds.

2. The Best Slim Option: Baseus Blade 100W

If you hate the “brick” feel of high-capacity power banks, the Baseus Blade is the solution. It is unique because it is built wide and flat about the thickness of a modern tablet rather than thick and chunky.

Why it’s perfect for the S25 Ultra: Despite its slim profile, it packs a 20,000mAh battery and 100W output. In our testing, it consistently triggered Samsung’s “Super Fast Charging 2.0” logo instantly. It fits perfectly into a laptop sleeve or the document pocket of a backpack, making it the best choice for commuters and students.

Capacity: 20,000mAh
Max Output: 100W (PPS Supported)
Best For: Commuters who value a slim, bag-friendly design.

3. The Best Value: INIU 65W 20000mAh Power Bank

INIU has built a reputation for providing premium specs at a fraction of the cost of the “big” brands. Their 65W model is the sweet spot for Samsung users on a budget.

Why it’s perfect for the S25 Ultra: For about half the price of the Anker 737, you still get a 20,000mAh capacity and enough wattage to hit the S25 Ultra’s 45W limit. It even includes a handy pop-out phone stand, allowing you to watch videos or take video calls while your phone juices up. It’s a no-nonsense workhorse that doesn’t compromise on safety or speed.

Capacity: 20,000mAh
Max Output: 65W (PPS Supported)
Best For: Those looking for the best bang-for-your-buck.

4. The Most Versatile: Goal Zero Sherpa 100AC

If you are an outdoor enthusiast or a professional photographer using the S25 Ultra as a field monitor, the Goal Zero Sherpa 100AC is in a league of its own.

Why it’s perfect for the S25 Ultra: Beyond the high-speed USB-C ports that support Samsung’s fast charging, it features a built-in AC outlet. This means you can charge your S25 Ultra via USB-C while simultaneously running a camera battery charger or even a small laptop. It’s rugged, airline-approved (95Wh), and designed to take a beating in the field.

Capacity: 25,600mAh (95Wh)
Max Output: 100W USB-C + 100W AC
Best For: Photographers, campers, and outdoor professionals.

5. Maximum Capacity: Anker 747 Power Bank (PowerCore 26K)

When you need the absolute maximum amount of energy allowed on a plane, you go for the Anker 747. It sits right at the 99Wh limit, offering a massive 25,600mAh of juice.

Why it’s perfect for the S25 Ultra: The 747 is for the traveler who doesn’t know when they’ll see their next wall outlet. It can keep an S25 Ultra alive for an entire week of moderate use. It features four ports (2 USB-C, 2 USB-A), meaning you can charge your phone, your tablet, your watch, and your wireless earbuds all at once. Anker’s MultiProtect safety system ensures that even when pushing massive amounts of power, your S25 Ultra stays cool.

Capacity: 25,600mAh
Max Output: 87W (PPS Supported)
Best For: Long-haul travelers and international explorers.

Buying Guide: How to Choose the Right Power Bank for Your Samsung S25 Ultra

Choosing a power bank isn’t just about picking the highest number. Here is what you should consider specifically for the S25 Ultra.

1. The PPS Factor (The Non-Negotiable)

As mentioned before, PPS (Programmable Power Supply) is the secret sauce. Standard USB-PD works in fixed steps (5V, 9V, 15V, 20V). PPS allows the phone to request granular voltage adjustments (e.g., 11.2V) to minimize heat and maximize speed. If a power bank doesn’t list “PPS” in its specs, it will likely drop back to 25W or even 15W charging on your Samsung device.

2. Capacity vs. Weight

10,000mAh: Light, pocketable, gives about 1.5 charges. Great for a night out.
20,000mAh: The sweet spot. About the weight of a can of soda, gives 3-4 charges.
25,000mAh+: Heavy, backpack-only, gives 4-5 charges. Essential for travel.

3. Port Configuration

The S25 Ultra is a USB-C native device. Look for power banks with at least two USB-C ports. This allows you to charge the power bank and your phone simultaneously (Pass-through charging) or charge two modern devices at once without needing legacy USB-A cables.

4. Input Speed

Don’t just look at how fast the power bank can charge your phone look at how fast it can charge itself. A 25,000mAh battery can take 12+ hours to charge with a standard wall plug. Look for a power bank with at least 45W or 65W input speed, which can cut that time down to under 2 hours.

Samsung S25 Ultra Battery & Charging FAQ

Does the S25 Ultra support wireless charging?

Yes, the S25 Ultra supports 15W wireless charging. In 2026, many S25 Ultra users are opting for Qi2-compatible “magnetic” power banks that snap onto the back of the phone (using a compatible case), providing a convenient way to keep the battery topped up during the day.

What wattage does S25 Ultra charge at?

The S25 Ultra supports a maximum of 45W wired charging using the Super Fast Charging 2.0 protocol. It will also work with 25W and 15W chargers, but it will take significantly longer to reach a full charge.

How many times can a 10,000mAh power bank charge the S25 Ultra?

Realistically, you will get about 1.3 to 1.5 full charges. While the S25 Ultra has a 5,000mAh battery, power banks lose energy during the voltage conversion process and as heat. A good rule of thumb is to assume about 65-70% efficiency for the total mAh rating.

Is it safe to use a 100W laptop charger on the S25 Ultra?

Yes, it is perfectly safe. USB-C is “smart” the phone will only draw the amount of power it can handle (up to 45W). However, you will only hit that 45W speed if the laptop charger supports the PPS protocol at the correct voltage/amperage steps.

Does the S25 Ultra come with a 45W charger in the box?

No. Following the trend of recent years, the S25 Ultra ships with only a USB-C to USB-C cable (usually a 3A cable). You will need to purchase a 45W wall brick or a high-speed power bank separately to get the best speeds.

Conclusion: Which One Should You Buy?

If you want the best of the best, go with the Anker 737. The combination of speed, capacity, and that incredibly useful display makes it the perfect companion for a flagship like the S25 Ultra.

For those who want something more portable for daily use, the Baseus Blade offers an unbeatable slim profile without sacrificing the 45W speed.

No matter which you choose, ensure you are using a high-quality 5A USB-C cable. The S25 Ultra is a powerhouse of a phone don’t let a cheap charger or cable hold it back.

Check out our full database of product reviews for more in-depth testing of the latest charging tech.