As time goes on, even the most advanced batteries can wear out, especially if they’re constantly charged and discharged. The best power banks we have tried have all come from Anker, but that doesn't mean Anker is the only brand you should consider. All of the power banks on this list passed our testing, traveling with us on the road and powering our devices at home. Anker is the best, but these batteries from Baseus and Otterbox performed well. We have tested the best power banks by using them to charge a variety of devices, including Apple iPhone, Google Pixel, and Samsung Galaxy phones. We have also charged Apple iPad tablets, and small laptops including a Pixelbook Go and a Surface Laptop Go. In addition, make sure not to leave an external battery for a long time without using it. If the power bank is of no use, dispose of it properly and go shopping for another model that will better suit your needs. Fixing Your Power Bank

We wish there wasn't such an easy answer to this question, because competition is better for everybody, but Anker is making the best power banks right now by far. It offers the best power-to-weight ratio, the fastest charging, and the most useful features. There are plenty of other power bank makers around, and most of them have not caught up to the faster charging speeds available on the iPhone 15 family, let along even faster Android phones. Except for unique form factors or serious bargains, we stayed away from recommending power banks from reputable makers if they couldn't charge at 2023 speeds.Power banks have a lifespan of 4 to 5 years on average and can retain a charge for 4-6 months without depleting much power. Depending on the type and model, a power bank battery can last between 300 to 1000 power cycles. Is It Possible for a Power Bank to Explode? You're trying to keep it simple: The Baseus Airpow doesn't have any built in wires or wireless charging, so you'll need to carry extras when it's time to power up.

In fact, our testing confirms what battery makers usually claim. A battery maker will claim between 60% and 70% efficiency, so that 10,000mAh battery will only give your phone around 6,000mAh of extra battery charge, at the least. In practice we find around 65% efficiency, though occasionally we can do even better.In terms of charging, this massive power bank can charge an iPhone 15 more than five times. It can charge a big Galaxy S23 Ultra's 5,000mAh battery three-and-a-half times. Best of all, it charges at the fastest speed available on most of your favorite phones (excluding Oppo/OnePlus's unusual SUPERVOOC battery). Almost all power banks are shipped with a charging cable that can be used to charge the device by plugging it into an electric power outlet or another power source, such as a laptop’s USB connection. Why Does My Power Bank Automatically Shut Down After 30 Seconds? You can try charging a separate gadget with your power bank if you’ve been using it to charge one mobile phone. You should also attempt to use an alternative power cable. If that doesn’t work, use a different power bank adapter to charge. Factors That Cause Power Banks to Stop Working You need a lot of power: Thankfully, the battery on the Tylt Bottle 2 isn't so big it adds too much weight, but that also means it isn't powerful enough for multiple charges.