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)

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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). Experience lightning-fast 200W charging that can power a 16" MacBook Pro to 50% in just 40 minutes to keep you productive on the go.

The most important question to consider when buying a power bank is what will you be charging? If you are charging a small smartphone and that's all, a simple power bank will suffice. If you plan on charging a laptop occasionally as well, or many devices at once, you'll want something with more power and more features. 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? You may be asked for detailed information on the power bank. This is usually printed on the device, but can rub off with frequent use. If it’s close to the limit and you can’t prove it’s under 100Wh, be prepared for it to be confiscated.

Don’t get stuck without a charger for your gadgets. We’ve picked out the best power banks to help you recharge while you’re on the go

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. It’s worth getting a power bank with both ports as USB-C becomes more commonplace, and it’s the port that is faster and gaining popularity. When it comes to the power bank output, you’ll want to look for ones that can output at least 20W via USB-C, as this is the fastest speed to recharge an iPhone. Wireless charging One advantage of this shift to USB-C is that power banks now support USB PD for faster charging. This means your power bank will often recharge faster when connected to a suitable fast charger, at anywhere from 20W to 60W. At those speeds, even a high-capacity charger can recharge fully in three to four hours. Think about how you’ll be carrying it around and what you need it for – a power bank for your bag can be quite different than one for travelling or camping.

This port is designed for the classic chunky USB cable. While USB-A ports are slowly disappearing from laptops, they're still among the most popular and versatile cable types. 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.The power bank combines ultra-compact dynamic power, maximum charging speed for every port, the advanced ActiveShield™ 2.0 safety system, unparalleled compatibility, and Power Delivery 3.0 technology, ensuring efficient and secure charging for all your devices.

Using the Anker Prime power bank, we were also able to test the charging speed claims of other power banks, as the Anker Prime will report charging speed in wattage. Lightning-Fast Recharge: The 100W rapid recharge via the USB-C port and Anker Prime Charging Base enables the power bank to be fully recharged in 1 hour and 15 minutes.The bottle is actually a nice, insulated affair, and it kept ice in cold water for 12 hours, which is all that we need. It has a good, strong strap to carry the bottle, though we would have liked a lid that was easier for sipping. Don’t know your USB-A from your USB-C or Micro USB? It doesn’t have to be too confusing. The older USB-A is the connector you’ll have seen often over the past 10 years or so (think little portable USB drives) while the newer USB-C connector is the one that has come with the newest Androids and iPhones (on one end at least, these still charge via Apple’s Lightning port). 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.