Either there’s a risk of damaging the accessory or its charging case, or the smarter power banks can even shut down due to the low demand. The USB-A output is specified as 10W, but in our tests we measured the output at between 7W and 9W depending on the phone. Available in a choice of classic colours, each with a power indicator that shows energy levels at all times. It’s also a lot slower charging than USB-C which its capable of using, so really its inclusion is a bit of a oddity.

If you care more about convenience than speed, wireless charging is very much the way to go – and a growing number of power banks support it.And while we’ve seen some superb long-life smartphones recently, you can still find you’re running out of charge before you can get near a socket, especially if you’re playing games or streaming video. The Eco 3 is one of the smaller entries in Juices line of portable chargers made from recycled plastic. Each screen/pad/die is a unique physical piece for each design for any given product, so the first time we imprint a design on a product we need to make this piece. Personally I prefer longer and slimmer designs of Anker power banks, but I can see the appeal as it may fit into some smaller bags easier.

In fact, with bigger power banks, you can get away for a weekend or go camping and still keep your phone juiced up. The perfect accessory for a day or two off the grid – if you know you'll be without mains power for your little staycation or special trip away this year, pack the Juice 3 Charge Power Bank to make sure all your devices are powered up. As you would expect, it’s heavy (6kg) and fairly large, but it retains a sense of portability thanks to a neat handle situated at the rear, meaning it’s not too taxing to move it between a car boot and a campsite, for example. However, we love the tough, slightly rubberised casing, the digital capacity display and the fact that it comes in a range of colours. LED indicator that is always on display to show you the remaining battery level left in the power bank.The Juice ECO 3 Power Bank now features three output ports, 2 x USB-A, 1 x USB-C and a faster 15W output.