This means understanding its mAh rating. You're probably already familiar with this rating as you'll typically see it when you're looking at power banks. It's also pretty common in specification ...

Expert tested and reviewed Some eagle-eyed power bank owners may have noticed that their 10,000 mAh power bank won't give them two recharges of their smartphone, which only has a 4,000 mAh battery.

They have a new flagship power bank for phones — and even larger devices like tablets and laptops — that looks compelling. It has a 9,600 mAh capacity, enough to charge your phone twice ...