Portable and easy-to-use mobile power bank

What is a power bank?

Power banks provide a reliable power reserve: compact, rechargeable units that keep phones, laptops, and tablets running when outlets are out of reach. Power banks range from tiny keychain models to 25-pound monsters. For this guide, we focused on the most useful category: personal-use portable banks.

What are the best portable chargers & power banks in 2025?

November 18, 2025: With this update, our lineup of recommended portable chargers and power banks remains unchanged. The existing picks have been vetted for currency and availability. The Anker Laptop Power Bank has a capacity of 25,000mAh, but more importantly, it can deliver 100W of power from a single port.

Do you need a portable battery or power bank?

Watching your phone or tablet steadily run out of power when you're nowhere near an outlet is stressful. But there's an easy solution: a portable battery or power bank. They are available in various sizes and capacities, and can include handy features such as fast charging and multiple ports.

How much power does a power bank give a phone?

Our testing shows that a power bank can offer your phone between 70-80% of the power it contains, or more depending on the battery. It loses the rest due to the inefficiency of the power transfer. That means a 5,000 mAh battery can fully charge a phone with a 3,500 mAh battery, like an iPhone 16.