PowerCore is equipped with a 10,000mAh cell capacity to keep your devices charged for at least a full day. Charge an iPhone 11 or Pixel 4 more than twice, or charge a Galaxy S20 over 1.5 times.

That means I could twist my phone sideways into landscape mode and use the Baseus power bank as a portable stand for Apple's new StandBy mode, which is one of my favorite features on iOS 17, and certainly the one I use the most often. Anker batteries also look great and are built with high quality parts. The display on our best battery for power users is bright and sharp OLED display, totally unnecessary for a power bank, but that's what makes Anker the best. It far exceeds our expectations of what's necessary to make power banks that are great.There are plenty of combination power bank and some other device, but the Tylt Bottle 2 actually makes sense because we're usually carrying an insulated water bottle anyway, so we might as well screw a battery onto the bottom. With a 5,700mAh capacity, the Tylt Bottle 2 is just enough to get us through a very busy day, or keep the phone powered while we play games at the cafe. Capacity:Think of capacity as the energy reservoir of your power bank. The higher the mAh (milliampere-hour), the more power it can store. So, choose a power bank with a capacity that suits your charging needs and can juice up multiple devices.

Anything with 20,000mAh or above will charge your phone multiple times, and many can charge several devices at the same time. As such, they're usually larger, weightier and can be more expensive. The 18W USB-C port offers the kind of charging speeds that you normally only find in a wall charger. Charge an iPhone 11 to 50% in 30 minutes or fully charge a Galaxy S20 in less than 2 hours. Our favorite power bank has a 10,000mAh battery, and the Samsung Galaxy S23 Ultra has a 5,000mAh battery, so the math should be simple, right? It charges twice. Except that's not how it works. Power banks are not 100% efficient, and even though you start with plenty of power, a lot of it is lost in the charging process. Do not use a 5W charger to charge your phone wirelessly and recharge PowerCore simultaneously. To charge simultaneously at full speed, it’s recommended to use a charger with at least an 18W output.

Which is the right power bank for you?

When you're after a power bank for a camping trip or weekend getaway, or to power your Switch or laptop, you'll want something with a higher capacity.

Charging Speed:MagSafe chargers can provide up to 15W of power to the iPhone series, significantly faster than most Qi wireless chargers, which typically deliver around 5W to 7.5W. For example, Anker 737 MagGo Charger (3-in-1 Station)can charge your iPhone 14 Pro Max to 50% in just 47 minutes.You can also charge the Anker Prime using both USB-C ports at the same time, for a combined recharging rate up to 170W. That means you can completely refill this whopping 27K mAh battery in under 40 minutes. I thankfully had an Anker 737 GaN Prime charger that was up to the task, and it's fun to see the percentage climb.

Qi-certification offers flawless wireless charging with compatible devices, while our exclusive PowerIQ 3.0 technology ensures optimized charging to virtually any mobile device including phones, tablets, and more. To test charging times and claims, we charged a Samsung Galaxy S23 Ultra and an Apple iPhone 15 to determine how many charges each battery offers these devices. We chose a common smaller battery phone as well as our best phone overall for this purpose. Over the years, the market has somewhat matured, and a bevy of different options have sprouted up. They're each designed for different use cases and tastes, so it's important to keep in mind exactly what you're looking for.

Speaking of that wall plug, it's the most useful feature ever on a power bank. Some power banks come with a built in USB-C cord, but this Anker comes with a two-prong power outlet plug. That makes it a wall charger as well as a power bank, and the utility can't be understated. Alignment Method: Traditional wireless charging requires a precise placement on the charging pad, while MagSafe chargers use built-in magnets to automatically align your iPhone, ensuring consistent optimal charging. Strength of Magnets: Ensure that the power bank has strong magnets to securely attach it to your device during charging. Apple doesn't publish its battery capacity, but teardowns have shown that the iPhone 15 has a battery with around 3,350mAh of battery life. That means a 10KmAh battery can charge that phone twice ... almost. You may not get to 100% the second charge, but you'll be in the 90% range.