Watching your phone or tablet steadily run out of juice when you’re nowhere near a power outlet is stressful. Fortunately, there’s no shortage of third-party backup batteries. And they come in every size and capacity (and price range) to keep your device going when your battery icon starts to dip in the red. And it doesn’t end there. Some power banks are equipped with features like fast charging, wireless charging, built-in cables, AC adapters, LED flashlights—even the ability to jump-start your car.
With so many options to choose from, how do you know which power bank is right for you? Read on for the most important points to consider, as well as the best battery packs we’ve tested.
Generally speaking, the bigger the battery, the higher the capacity and quantity of ports you get. Power banks that fit comfortably in your pocket are typically good for a full phone charge or two, while anything designed to keep you going all day is going to require a bag or a purse.