Anker 325 Power Bank, 20000 mAh External Battery PowerIQ Technology USB-C Port, Huge Energy Density, Compatible with iPhone, Samsung Galaxy, iPad and More (White)

Product Information

Brand Reliability: When it comes to portable power banks, it's essential to choose a trustworthy brand. Brands like Anker have a solid reputation for producing safe and high-quality products, ensuring your devices are charged efficiently and without any risks. A big power bank with 20,000mAh or more will deliver almost five charges for an iPhone 13 – and we’d recommend this size if you want to charge bigger batteries like those in an iPad or laptop. These are also about as big as you can bring on a flight (more on that below). We expect this competition will heat up next year as more power bank makers catch up and make faster charging batteries. Until then, Anker is the dominant brand, and if you want the best it's an easy choice. How many times can my power bank charge my phone?

On test, we found that this was able to restore 50% of our MacBook Air’s battery in 43 minutes with the supplied USB-C cable, and while it wasn’t quite able to get the battery to fully charge, it finished up at 98%, so it has a high enough capacity (enough for almost six recharges of an iPhone 14) to keep your laptop and phone going during your travels. On the technical side of things, if you only need to charge 1 device, a power bank with about 5,000mAh would suffice. But for multiple devices, or if you heavily use your phone and it runs out of juice more than once a day, invest in something that’s 10,000mAh and above.

Best 20,000mAh power banks

This is a popular cable type for charging power banks, older smartphones and other small devices - so there's a good chance you already have some around your home. Unlike USB-C and Lightning, micro USB cables need to plugged in the right way around - which can make them fiddly at times. Lightning (input)

The main feature that sets this power bank apart from others is its screen. The power bank can display in color – its current battery percentage, how long the battery will take to drain at the current output, how long the battery will take to charge, and exactly what each port on the power bank is outputting at any time. The screen can also show the current temperature of the battery to monitor its heat as well as charge cycles of the power bank and battery health, so you can keep tabs on if your power bank needs replacing. But if you’re looking for a slim power bank that’s able to power up both mobile phones and tablets, the 10,000mAh Mi Power Bank 3 is a sleek option for basic users. You can use it to charge 2 devices at one go, and it even comes with a function for charging on a lower current, for small current devices like smart watches and bluetooth headsets.All of our tests were conducted using the same wall adapter and, when possible, USB-C or Micro-USB cable. This was done to eliminate any discrepancies with wall adapters and cable throughput. What to look for in a portable power bank 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. Slim power banks are pretty common these days, but when it comes to a big capacity of 20,000mAh at an affordable price, the Pineng PN-917 20,000mAh Power Bank is among the most popular models out there. Most power banks now use a USB-C port to recharge, although some models will have a micro-USB port as well to ensure compatibility with older chargers. Don’t worry if you don’t have the required cable, as one will usually be provided in the box. The use of USB-C for the single input/output port is a little weird given the target market, and you’ll need a fast USB-C charger and a USB-C to Lightning cable to make the most of the device. What’s more, the wired charging isn’t super-speedy; our Android test smartphone only recovered by 11% from a 15-minute charge. But if you’re an iPhone user looking for a light and convenient portable charger, the Anker 622 is almost perfect for the role.

LED indicators: let you know when your device is charging, when it's fully charged and the level of energy your powerbank has left.

The Anker Nano is only 5,000mAh, but that doesn't mean it can fully charge a 5,000mAh phone battery like you'll find in the Galaxy S23 Ultra. Power banks are about 60-70% efficient, depending on the phone's technology, so this power bank is good for charging an iPhone 15 to nearly full, but that big Ultra will only get about 65% charge. Ports: Different devices have different charging ports, and your power bank should be compatible with them. Look for power banks with the right ports, such as Lightning or USB-C, to ensure seamless charging for all your devices. Having multiple ports is a bonus, allowing you to charge multiple gadgets simultaneously.

You don't have a magnetic phone: You don't need an iPhone to enjoy the magnetic charging, but you'll need a case that lines up your phone with Apple's MagSafe wireless configuration, or else your phone won't charge properly. For those who need something with more charging power, their slightly bulkier 20,000mAh Mi Power Bank – which has the same functions but double the charging capacity – is also worth a look. You only want to charge a phone: If you don't need to charge a laptop occasionally, or you only carry a phone with no accessories, the Anker 733 is more than you need.If you have a bigger budget and are looking for other types of power banks such as wireless and mini ones, their catalogue is worth a look too. The screen displays the percentage of battery remaining, how much battery is left in minutes and hours, and the current output of any connected devices. (Image credit: Gareth Bevan / Digital Camera World) Recharge the power bank up to 100W via the USB-C port for uninterrupted power whenever and wherever. 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.