Power banks aren’t exactly the most exciting pieces of technology to review. We generally want more capacity, faster charging, and something small enough that carrying it around doesn’t become inconvenient. UGREEN apparently looked at that formula and decided a 10,000mAh battery needed something normally associated with a gaming PC: liquid cooling. That’s essentially the idea behind the MagFlow Pro Qi2 25W Magnetic Power Bank, and after spending time with it, I’m surprised by how much sense that idea actually makes.

The MagFlow Pro combines a 10,000mAh battery with up to 25W Qi2.2 wireless charging on compatible devices, 45W wired USB-C output, a built-in USB-C cable, a smart display, and UGREEN’s CryoPulse liquid-cooling system. I’ve primarily been using it with my Samsung Galaxy S24 Ultra, and while UGREEN continues to heavily market MagFlow toward Apple’s ecosystem, this is arguably the product in the lineup that makes the most sense outside of it. The combination of wireless and wired charging makes it versatile, while CryoPulse addresses one of the biggest problems created when you attach a battery directly to the back of another battery: heat.

Retrofitted Design

UGREEN could have easily hidden the cooling system inside the chassis, but instead it made it part of the design. The upper portion of the MagFlow Pro features a transparent green window that allows you to see the liquid-cooling system operating inside. It’s definitely more visual flair than practical functionality, but I like it. It gives an otherwise ordinary-looking power bank some personality without making the design feel excessive. There’s also a separate display along the side that is considerably more useful, providing information such as remaining battery capacity and real-time charging wattage.

The integrated braided USB-C cable is another thoughtful addition and doubles as the carrying loop when you’re not using it. You also have a separate USB-C port, so I rarely feel like I need to bring another cable specifically for the power bank. At around 230 grams, this isn’t an ultralight battery, especially once it’s magnetically attached to a larger phone like my S24 Ultra. That’s the tradeoff for carrying 10,000mAh alongside the additional cooling hardware. It remains compact enough for a bag or pocket, but you’ll absolutely notice the additional weight when you’re actively using your phone with it attached.

Liquid Cooled

Inside are two 5,000mAh cells providing 10,000mAh of total capacity, with the MagFlow Pro supporting up to 25W Qi2.2 magnetic wireless charging on compatible devices. Wired output reaches 45W through either the integrated USB-C cable or USB-C port, while the power bank itself can recharge at up to 30W. That 45W wired option is particularly important to me because it gives the MagFlow Pro considerably more versatility than a product designed purely around magnetic charging. If I want convenience, I can attach my phone wirelessly. If charging speed matters more, I already have the cable built into the battery.

CryoPulse is obviously the headline feature. Rather than using a simple fan, UGREEN has incorporated a micro-pump that circulates coolant through the power bank to move heat away from critical charging components. Copper material and internal component separation assist with thermal management, while UGREEN’s Thermal Guard system monitors temperature and can adjust power accordingly. The company makes some aggressive claims about how much this can reduce temperatures, but what’s more important to me is that the technology isn’t simply decorative. The liquid is actually circulating, and the system is actively trying to manage one of the fundamental weaknesses of high-speed wireless charging.

Slim Performance

This is where the MagFlow Pro becomes considerably more interesting than its specifications suggest. Wireless power banks can get hot because you’re taking one battery that’s discharging, pressing it against another battery that’s charging, and transferring that energy wirelessly between them. Heat is practically inevitable. After using the MagFlow Pro, I generally agree with the early impressions surrounding CryoPulse: the cooling works. The power bank and phone remain impressively controlled thermally compared with what I normally expect from extended wireless charging, and that makes the feature feel much more substantial than the transparent window might initially suggest.

There is an important distinction, though. Keeping temperatures down doesn’t mean the MagFlow Pro will indefinitely maintain its maximum advertised wireless output. Charging performance still depends on the connected device, battery level, temperature, and the power bank’s own management system. Independent testing has also shown that the PB793 can reduce its output before temperatures become particularly high. I don’t view that as evidence that CryoPulse doesn’t work—the temperature results suggest exactly the opposite. Instead, it shows that UGREEN is taking a fairly conservative approach to balancing speed, heat, and battery protection. I’d rather describe this as one of the coolest-running high-performance wireless power banks I’ve used than make the much harder claim that liquid cooling automatically makes it the fastest.

What really sells the MagFlow Pro for me is everything working together. The magnetic attachment makes topping off my phone convenient, 10,000mAh gives me enough capacity to make carrying the battery worthwhile, and the 45W wired option means I’m not locked into wireless charging when I need power faster. The built-in cable eliminates another accessory from my bag, while the display gives me actual information instead of making me interpret four blinking LEDs. Even the Cyber Window, despite being largely cosmetic from the user’s perspective, gives the product an identity that most power banks simply don’t have.

REVIEW SCORE: 9/10

The biggest issue is price. At its $149.99 MSRP, UGREEN is asking a lot for a 10,000mAh power bank, and there are much cheaper batteries capable of providing similar capacity and strong wired charging performance. You’re paying a premium specifically for the complete package and, most importantly, CryoPulse. For someone who primarily charges over USB-C, I don’t think that premium makes much sense. For someone who regularly uses magnetic wireless charging and dislikes the amount of heat it can generate, this is a much more compelling piece of hardware. UGREEN took a technology that initially sounds excessive, applied it to a problem that genuinely exists, and built one of the more interesting power banks I’ve used in quite some time.

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