5,000mAh is the right size for someone who doesn't want to carry a second phone in their pocket. The Duracell Micro 5 fits somewhere between the size of a credit card stack and a deck of cards — slim enough to forget it's in your bag, powerful enough to fully charge most smartphones and still have capacity left for the next top-up.

Two USB ports means two devices can charge simultaneously without an argument about who needs it more. The LED indicator shows remaining capacity at a glance. And the Duracell name means this was built to hold a charge when it's sitting in your drawer for three weeks between uses — which is the battery test that actually matters.

Found at(retail was). The Emporium considers a 50% discount on Duracell a straightforward win.