Anker Power Bank 25K 165W Review: High-Output Charging with Built-In USB-C Cable for Serious Multi-Device Charging

As more users rely on laptops, tablets, and multiple devices throughout the day, traditional power banks are no longer enough. While compact models work well for smartphones, they often struggle with higher power demands and multi-device charging. The Anker Power Bank 25K 165W is designed to fill that gap. With a large battery capacity, high total output, and built-in retractable cables, it positions itself as a portable power solution to simplify high-power charging on the move.

What Is It

The Anker Power Bank 25K 165W is a high-capacity portable charger equipped with a 25,000 mAh battery and a maximum combined output of 165W. It features built-in USB-C cables, along with additional USB-C and USB-A ports, allowing multiple devices to be charged at the same time. Unlike smaller daily carry power banks, it is designed to handle sustained high power output and multi-device charging, making it suitable for work-focused and power-heavy use cases.

Design & Build

The power bank is noticeably larger and heavier than typical 10,000 mAh models, which is expected given its capacity and output, but I would say it maintains a relatively compact form factor for this huge capacity. It measures 156.97 × 53.85 × 49.02 mm and weighs 595 g, which places it close to a soda-can-sized profile. It is still portable enough to fit into a backpack, but it is not intended for pocket carry. The body feels solid and well-constructed, with a focus on durability rather than minimal weight.

One of the standout design is the inclusion of two built-in USB-C cables. The first is a retractable USB-C cable measuring 0.69 m, designed for everyday charging convenience. The second USB-C cable measures 0.3 m and doubles as a carry strap. This strap is braided for better durability and can support up to 44 lbs, which converts to approximately 20kg. This adds a functional and durable carrying option while reducing the need for additional accessories.

The overall construction feels solid and purposeful, prioritising durability and stability over minimal weight. The port layout is clean and practical, allowing multiple devices to be connected without clutter. On the front, there is a real-time smart display that goes beyond basic battery percentage. It provides live updates on battery level, output wattage and input wattage, as well as estimated recharge time. Users can also view battery temperature, battery health, and real-time power flow, which is especially useful when charging multiple devices or monitoring high-output sessions. This level of transparency helps users better understand how power is being distributed and managed.

Performance

The Anker Power Bank 25K offers up to 100W maximum output from every USB-C port, making it capable of charging most laptops at full speed (of course not your hungry gaming machine). The USB-A port supports up to 33W max output, which is sufficient for fast-charging smartphones and accessories.

In dual-port charging scenarios, the power bank can deliver 165W max when charging two USB-C devices. Do note that this is the only situation where the full 165W output is achievable. When using one USB-C port together with the USB-A port, the combined output is 133W max. For triple-port charging, the first USB-C port delivers up to 100W, while the remaining two ports share 30W max. In four-port charging scenarios, the USB-C Port 1 maintains 100W max, with the other ports again sharing 30W max.

Note:

USB-C Port 1 = retractable cable USB-C Port 2 = carry strap

USB-C Port 3 = at the side together with USB-A Port

In actual use, the power bank handles single-device charging effortlessly and remains stable when multiple devices are connected. Power distribution is managed intelligently, ensuring consistent output without sudden drops. Heat buildup is noticeable under heavier loads, but thermal control is managed well enough to sustain performance during longer charging sessions.

To support high-output charging safely, the Anker Power Bank 25K is equipped with ActiveShield 2.0 protection. This system monitors temperature over 3,000,000 times per day, helping regulate heat and protect both the power bank and connected devices during charging. This is particularly important for a device capable of sustained high-wattage output, adding an extra layer of confidence when charging laptops and multiple devices at once.

What It Does Well

The Anker Power Bank 25K 165W delivers strong and consistent power output suitable for laptops and other power-hungry devices. Its large battery capacity supports extended use without frequent recharging. The inclusion of two built-in USB-C cables, including a retractable cable and a braided carry strap cable, adds meaningful convenience while reducing cable clutter. Multiple ports allow several devices to be charged at once, while the real-time smart display provides clear and useful charging information. Overall, it functions as a reliable portable power solution rather than a simple phone charger.

Where It Falls Short

The size and 595 g weight make it less suitable for casual daily carry. It is best suited for backpacks or work bags. Recharging the large battery still requires a high-wattage charger to achieve optimal speeds. Users who mainly charge smartphones or small accessories may find its capacity and power excessive for their needs. While portable and 3C certified, it is still subject to airline battery regulations, which may limit travel flexibility. The focus on power and capacity means it is more than what casual users may need.

Verdict

The Anker Power Bank 25K 165W is designed for users who rely on laptops and multiple devices throughout the day. It is well suited for professionals, remote workers, creators, and travellers who need reliable high-output charging without need to consistently look for power outlets. While it is less portable than compact power banks, it delivers the capacity, charging speed, and flexibility required for demanding use. For phone-only users, it may feel excessive, but for those who demand performance and capacity, it functions as a reliable mobile power station and fills the role that smaller power banks simply cannot.