{"pageUrl":"https://comparethespecs.com/technology/storage-power-banks/which-external-battery-offers-the-best-capacity-for-my-needs","lastUpdated":"2026-09-03","totalProducts":3,"niche":"Which external battery offers the best capacity for my needs?","description":"Which external battery offers the best capacity for my needs?","products":[{"brand":"Anker","model":"Prime Power Bank 27650mAh 250W","price_gbp":133.09,"origin_country":null,"specs":{"weight":"665g","capacity":"27650mAh","charging_time":"43 minutes at 140W","output_current":"5A USB-C; 6.5A USB-A","output_voltage":"5V-28V USB-C; 5V-10V USB-A","number_of_ports":"3","input_charging_method":"USB-C; optional charging base"},"confidence_score":null,"sources":[{"label":"Best Buy","url":"https://www.bestbuy.com/product/anker-prime-27650mah-power-bank-250w-black/JJ8586VPYK","currency":"USD","source_country":"US","price":179.99,"price_gbp":133.09,"scraped_at":"2026-09-03T13:12:47.243858"}],"summary":"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_for":"It 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."},{"brand":"UGREEN","model":"145W 25000mAh Power Bank","price_gbp":50.58,"origin_country":null,"specs":{"weight":"505g","capacity":"25000mAh/3.6V/90Wh","charging_time":"2 hours with a 65W PD charger","output_current":"USB-C1: 5A max; USB-C2: 3.25A max; USB-A: 3A max","output_voltage":"5V, 9V, 12V, 15V, 20V, 28V","number_of_ports":"3","input_charging_method":"USB-C PD up to 65W"},"confidence_score":null,"sources":[{"label":"UGREEN","url":"https://us.ugreen.com/products/ugreen-145w-power-bank-for-laptop","currency":"USD","source_country":"US","price":68.41,"price_gbp":50.58,"scraped_at":"2026-09-03T13:12:47.243858"}],"summary":"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_for":"It 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."},{"brand":"Nitecore","model":"NB20000 Gen 3","price_gbp":77.6,"origin_country":null,"specs":{"weight":"291g","capacity":"20,000mAh 3.6V (72Wh)","output_current":"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","output_voltage":"5V, 9V, 12V","number_of_ports":"2","input_charging_method":"USB-C"},"confidence_score":null,"sources":[{"label":"Nitecore UK","url":"https://www.nitecore.co.uk/products/nitecore-nb20000-gen-3-power-bank.html","currency":"USD","source_country":"US","price":104.95,"price_gbp":77.6,"scraped_at":"2026-09-03T13:12:47.243858"}],"summary":"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_for":"It 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."}]}