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.

The problem with this design is that placing those cells into a casing would be inefficient and you end up having empty spaces, making the design clunkier than it needs to be. For years this technology has been used in batteries, you may have noticed this in other household appliances. 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. While it’s big compared to some of the others on this list, this chunky model is the best power bank to invest in if you want a versatile and impressive battery to charge up your laptop, iPad, phone and everything in between. You need power for your phone: The 3,000mAh battery inside is plenty to keep your Apple Watch going, but that isn't enough power to get you even halfway charged on an iPhone 15, and even less on bigger phones.The Anker Prime series of Power Banks, including the Anker Prime 27,650mAh Power Bank (250W) and the Anker Prime 20,000mAh Power Bank (200W), are for people who truly love to geek out on power banks. If you came looking for the absolute best power bank you can buy, this is the best we've tried. This can get pretty complicated, to be honest, but to help we’ve made sure that none of the power banks included on our list is too large to bring on a plane.

You need fast power: This is a very slow charger, whether wired or wireless, so it's better for casual charging while you sip your water and read a book. 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. 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. Apple has added its clever “MagSafe” tech to every iPhone (other than the SE) since the iPhone 12. It uses magnets to ensure perfect alignment for a range of accessories including wallets, wireless chargers and, of course, power banks. 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.One USB-A port (18W) and one USB-C (18W). Can charge most smartphones two or three times (10,000 mAh). 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. 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. 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).