The Anker Prime Power Bank 300W has a capacity of 26,250 mAh, an energy rating of 99.75 Wh and a maximum output of 300 W. Its two USB-C ports and one USB-A port can charge multiple devices at once, from a smartphone and headphones to a laptop.
The Anker Prime Power Bank 300W has a capacity of 26,250 mAh, an energy rating of 99.75 Wh and a maximum output of 300 W. Its two USB-C ports and one USB-A port can charge multiple devices at once, from a smartphone and headphones to a laptop.
Capacity and output
The 26,250 mAh capacity provides enough energy to recharge a smartphone multiple times or top up other mobile devices. The usable energy is lower than the stated 99.75 Wh because some is lost during voltage conversion and charging. The number of charges also depends on the battery capacity of the connected device.
The power bank has a maximum output of 300 W. A single USB-C port can provide up to 140 W, which is useful for charging more demanding laptops or tablets. Actual output depends on the connected device, the cable and how power is shared between ports. The 140 W single-port rating therefore does not mean that output will always be available when other devices are charging at the same time.
Ports and compatibility
The two USB-C ports and one USB-A port let you connect, for example, a laptop, smartphone and headphones at the same time. The mix of connectors is also useful for accessories with an older USB-A cable, although you will need to bring suitable cables with you.
The power bank supports USB-PD, Huawei SuperCharge and Xiaomi Surge fast-charging protocols. It can therefore fast-charge compatible devices from different brands. Actual charging speed depends on the specific device and cable, not just the power bank’s maximum output.
Recharging the power bank and display
The power bank itself accepts up to 250 W of input power through its USB-C ports. Suitable chargers and cables are needed to make use of high input power. It can regain approximately 40% of its capacity in 10 minutes, although the actual time depends on charging conditions and the accessories used.
The display shows the charge percentage and power at each port, so you can see how much charge remains in the power bank and how the connected devices are charging.
Dimensions and air travel
The power bank measures 159.9 × 62.7 × 38 mm and weighs approximately 600 grams. It fits in a bag or backpack, but its weight is worth considering when carrying it.
Its 99.75 Wh energy rating is just below the 100 Wh threshold used when assessing batteries for air travel. That rating alone does not guarantee unrestricted carriage. Before travelling, check the current rules for your airline, airports and route, especially requirements for keeping the power bank in carry-on baggage and using it during the flight.
The Anker Prime Power Bank 300W is aimed at people who want to charge multiple devices, including a laptop, while travelling. Its strengths are high output, three ports and fast recharging of the power bank itself; the trade-off is a weight of approximately 600 grams.