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You’ll need to plug in your device and then press the power button, which just seems like an unnecessary extra step in this day and age. Learn more in our full Moshi IonSlim 5K review. 15. Zendure A6PD We’ve concentrated on standard USB power banks in this chart, but that’s to ignore an entirely category of devices that build in USB Power Delivery support. Power Delivery devices can output up to 100W, which means they are technically capable of driving a USB-C-powered laptop or games console. Power Delivery chargers can be confusing, however, since not all make it clear in their marketing their exact power output, and some are a long way from that magical 100W.

This is actually more important than most users will realise, too: a 29W power bank isn’t going to charge a laptop that requires 45W. It’s no surprise that Power Delivery banks cost more than standard power banks, and that’s why you’ll find Zendure’s offerings toward the bottom of our chart. Most users will not need to spend this amount on a power bank, but for those who do they make excellent purchases. The A6PD (reviewed here) is a 20,100mAh power bank with a 45W output, available from Amazon for £69.99/$72.99. If this isn’t enough juice then there’s also the A8PD, which has a 26,800mAh capacity but slightly lower 40W max output. It’s not available on Amazon UK just yet (coming soon), but in the US you’ll pay $94.99 (also via Amazon). Aside from the capacity the two power banks also differ in the number of outputs they offer.

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While the A6PD offers a single full-size USB output, a USB-C input/output and a Micro-USB input, the A8PD has swaps the Micro-USB port for an additional three full-size USBs. It will charge in just five hours using a 30W USB PD charger. In other respects the two Zendure power delivery banks offer all the things we expect from Zendure, including the crushproof casing, passthrough charger and higher-than-standard efficiency rating and standby. See our Power Delivery Power Banks round-up for more details. 16. RavPower PowerStation Series 20100mAh Portable Power Outlet This RavPower PowerStation sits at the bottom of our chart not because it’s not any good (actually we wouldn’t recommend anything here we wouldn’t personally own and use ourselves), but because for most users it will be overkill, and probably over budget.

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The PowerStation is available from Amazon for £89.99/$95.99, and there is plenty here to warrant that somewhat extravagant price. The PowerStation stands out for its inclusion of an actual plug socket – and not a US or EU two-pin plug that you need to pair with an adaptor, but an actual UK three-pin plug, rated at 65W. These things are hard to come by. (That said, if you need a two-pin version there’s also the £119.99/$129.99 RavPower PowerStation 27,000mAh version, reviewed here.) As well as the plug there’s a 19V/1.6A DC jack for significantly faster recharging – despite its huge capacity you can recharge this bank in just four hours, when a comparable bank might take 13 hours over a standard Micro-USB input. At 69x69x146mm this power bank isn’t going to fit in anyone’s pocket, but it does come with a hard mesh case and all the necessary attachments (including some carabiner clips).