Multi-function portable power bank for home use

What is a power bank?

A slew of terms are used to describe power banks, including portable batteries, portable chargers, external battery packs and even, somewhat confusingly, USB chargers, which is what wall chargers are often called.

What is the best portable power bank?

ZDNET saves you time and money by delivering the best products and tech deals to your inbox every week. We've tested the best portable power banks, which are MagSafe, portable, rugged, and more, to keep your devices powered up. Here are our recommendations.

What is a 25,000 mAh power bank?

25,000mAh for Long-Haul Power: Set off on extended journeys with a huge 25,000mAh capacity that supports your devices through multiple uses, complete with 100W ultra-fast recharging that fuels the power bank to 30% in just 20 minutes.

How do power banks compare?

We also compare power banks based on their power-to-weight ratio, which tells us how much battery life you get for the extra weight you're forced to carry. We've got power banks for power users that give you detailed information about the devices you're charging, or simple magnetic power banks than smile while your iPhone charges.

How many charges can a power bank charge?

To estimate the number of charges, use this formula: (Power Bank Total Capacity × 0.65) ÷ Device Battery Capacity. For example, a device with a 3,349mAh battery can receive approximately 4.8 charges from a 25,000mAh power bank. How long does it take to recharge the power bank?

How much power does a power bank hold?

This power bank is, in a word, chunky. It's a fair-sized brick weighing in at a pound. Inside are batteries that hold 20,000mAh (72Wh) of power, enough for a few charges of a modern smartphone and more than one charge of a laptop -- while still being within the limit for airline travel.