About the size of a Mars bar, the 321 is one of the smallest power banks in Anker's range and our pick for the best power bank under £30. It's a pocketable charger that has enough capacity to ...

Best for Apple devices – Belkin boostcharge pro: £59.99, Amazon.co.uk Best for multiple devices – Anker Prime 27,650mAh power bank: £144.99, Amazon.co.uk ...

The Anker Laptop Power Bank is a versatile beast. The generous 25,000-mAh capacity is enough to charge most phones more than four times over, but it stops shy of the limit for carry-on air travel ...

Head to Amazon to pick up a 10,000mAh Anker Power Bank right now for just $18, down from its usual price of $26. That’s $8 off and a discount of 31%. See at Amazon ...

The main USB-C cable can actually click back into the power bank so you’ll never find yourself without a cable. See at Best Buy 20,000mAh is the total energy this power bank holds.

Devices with 25,000 mAh or more offer additional buffering. USB-C connection: Modern laptops are best charged via USB-C. Your power bank should therefore offer a corresponding USB-C output.