Which external battery offers the best capacity for my needs?
This page compares 3 external batteries with verified specifications and prices. Top options include Anker Prime Power Bank 27650mAh 250W, UGREEN 145W 25000mAh Power Bank, Nitecore NB20000 Gen 3. Prices range from £51 to £133. All data is sourced from manufacturer documentation and specialist retailers.
| Product ⇅ | Price ⇅ | Capacity (mAh) ⇅ | Output Voltage (V) ⇅ | Output Current (A) ⇅ | Charging Time (hours) ⇅ | Weight (g) ⇅ | Input Charging Method ⇅ | Number of Ports ⇅ |
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Anker Prime Power Bank 27650mAh 250W
US
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£133.09 ≈ | 27650mAh | 5V-28V USB-C; 5V-10V USB-A | 5A USB-C; 6.5A USB-A | 43 minutes at 140W | 665g | USB-C; optional charging base | 3 |
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This power bank has a 27650mAh capacity and delivers up to 250W across two USB-C ports and one USB-A port. It supports fast laptop charging, app-based monitoring, and rapid USB-C recharging, making it well suited to travelers and users carrying power-hungry devices. ★ Ideal forIt suits users seeking the best capacity because its 27650mAh battery provides up to 99.54Wh of portable energy while supporting up to 250W output and charging up to three devices. |
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UGREEN 145W 25000mAh Power Bank
US
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£50.58 ≈ | 25000mAh/3.6V/90Wh | 5V, 9V, 12V, 15V, 20V, 28V | USB-C1: 5A max; USB-C2: 3.25A max; USB-A: 3A max | 2 hours with a 65W PD charger | 505g | USB-C PD up to 65W | 3 |
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This power bank has a 25000mAh capacity, up to 145W combined output, two USB-C ports, one USB-A port, and a digital battery display. It suits laptop users, travelers, and anyone needing to charge several devices on the go. ★ Ideal forIt offers a substantial 25000mAh capacity with enough output to recharge laptops, tablets, and phones, making it a strong choice when maximum usable capacity and multi-device charging matter. |
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Nitecore NB20000 Gen 3
US
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£77.60 ≈ | 20,000mAh 3.6V (72Wh) | 5V, 9V, 12V | USB-C OUT1: 3A at 5V, 2.22A at 9V, 1.66A at 12V; USB-C OUT2: 2.4A at 5V, 2A at 9V, 1.5A at 12V | — | 291g | USB-C | 2 |
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The Nitecore NB20000 Gen 3 is a 20,000mAh carbon-fibre power bank with two USB-C ports, pass-through charging, IPX5 water resistance, and a lightweight 291g design. It suits hikers, campers, and travelers who need substantial capacity without carrying a heavier power bank. ★ Ideal forIt offers a large 20,000mAh capacity and 72Wh of energy while weighing only 291g, making it a strong choice for multi-day trips where capacity and low weight both matter.
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